History Doorstopper / FanWorks

[[folder:Over [=2,000,000=] words (single)]]

* As of November 24, 2022, counting at 5,007,400 words and updated weekly ''Fanfic/SmashLife'' has become the longest VideoGame/SuperSmashBros fanfic, surpassing ''Worlds Conquest''. For those who are curious: It's a documentary-style semi-reality show that deals with the life of the brawlers inside the Smash Mansion.
* ''Fanfic/EquestriaGirlsFriendshipSouls'': A FusionFic between ''Manga/{{Bleach}}'' and ''WesternAnimation/MyLittlePonyEquestriaGirls''. After seven years it counts 2,179,486 words (2,321,304 with a finished crossover story) and keeps being updated regularly every 2-3 weeks.
* On 17th June 2017, ''Fanfic/AmbienceAFleetSymphony'' reached 4,061,145 words, replacing ''Fanfic/TheSubspaceEmissarysWorldsConquest'' as Platform/FanFictionDotNet's longest ongoing fanfiction, and as of 24th January 2020, it is sitting at an even longer 4,102,328 words long. Having been first published on 8th May 2014, it was at one point the fastest-growing fanfiction on the site, with the author consistently putting out chapters near or exceeding 10,000 words every other day between the start of 2016 and mid-2017.

* ''Fanfic/DiariesOfAMadman'', which as of November 2022, is over 3.2 million words, holding the title of the longest fic on [=FIMFiction=], with no sign of slowing down anytime soon.
* The same creator of ''Fanfic/SoulChess'' brought us ''Fanfic/FairyWithoutWings''. While ''Soul Chess'' did not break 2,000,000 words (see below) this one did and is ''still ongoing''.

* ''Fanfic/SongsOfTheSpheres'' is a MassiveMultiplayerCrossover that was completed on April 20th, 2020 with 2,027,047 words under its belt.
* ''Manga/AhMyGoddess'' fanfic ''Fanfic/TrialByTenderness'' sits at just over 2.2 million words as of December 2014 -- at ''Harry Potter'' word-per-page rates, that's around 7,000 pages, and over three times the length of ''Literature/AtlasShrugged''. The author doesn't seem to be planning on stopping anytime soon, either.
* ''Fanfic/SenranPersonaNinjasOfHearts'', which reaches 2,650,549, is, so far, the longest ''Franchise/{{Persona}}'' and ''VideoGame/SenranKagura'' crossover as of November 2023 (and perhaps the longest ''Senran Kagura'' story), and is still ongoing.
* ''Fanfic/{{The Chase|MyLittlePony}}'' clocks in at over 2,300,000 words ''(contained within over 800 chapters)'' as of November 2016.

* ''Fanfic/ACertainUnknownLevel0'' has reached 3,313,215 words as of March 2023, and is by far the longest ''Literature/ACertainMagicalIndex'' fanfiction on fanfiction.net. Spread over 176 chapters, it boasts an average count of more than 18,000 words per chapter.
** Chapters in recent arcs rarely contain fewer than 20,000 words (and more than 30,000 on occasion), which is down in part to the author writing responses to all those who leave comments (some of them ''very'' detailed).
** The infamously lengthy Uiharu Kazari arc alone has over 1 million words.
* The longest fanfic on Japanese fanfiction archive Hameln is ''Fanfic/TenseiTrouble'' ([[https://syosetu.org/novel/179815/ Link]]), and it stands as a reminder that absurdly long fanfics aren't limited to English: as of 20 September 2020 its length is 2985 chapters and '''15,260,785 characters''', making it far longer than any of the other fanfics on this page even after correcting for the difference in word density when translating from Japanese to English. The fic updates daily.

** Author Vimesenthusiast not only have Third Path, but also regularly updates four fanfics of over a million words, one at over three quarter of a million, and another five at over a quarter of a million. This not counting the FINISHED works.

* ''Fanfic/OfKeysAndHammers'' ([[https://www.fanfiction.net/s/13658054/1/ link]]) is a ''Franchise/KingdomHearts'' and ''TabletopGame/{{Warhammer}}'' crossover that's currently over 2,476,000 words and ''still'' updating.
* ''Fanfic/HarryAndTheShipgirls'', a ''Franchise/HarryPotter'' and ''VideoGame/{{KanColle}}'' crossover, has well exceeded 9 ''million'' words and is updating daily. No one knows the exact length for two reasons:
** The sites where the story is hosted, Spacebattles and Sufficient Velocity, only assign word counts to content with a threadmark attached to it, and the story has moved too quickly for the person responsible for threadmarks to keep up.
** Each site has a number of authors who post content exclusively to that site, further complicating record-keeping.

[[folder:Over [=2,000,000=] words (series)]]
* Lightning on the Wave's AlternateUniverse ''Literature/HarryPotter'' epic known as the ''Fanfic/ArcOfSacrifices''. It's posted as 7 separate stories (mirroring the 7-book format of the HP series), so the site doesn't record the full tale's word count. This is really too bad, since it clocks in at just over '''3 million''' words. Surprisingly enough (for a fanfic), it's actually a complete story. The author wrote it between September '05 and Jan '07, posting an average of 6400 words per day.
* ''Fanfic/UndocumentedFeatures'' clocks in at (as of early November 2008) approximately 20 megabytes of pure ASCII text. That's 3.5 million words long. Which actually makes it longer than the ''Sacrifices Arc''.
* ''Fanfic/LatiasJourney'', weighs in at 1,237,300 words. Combining it with its sequel ''Fanfic/BraveNewWorld'', already mentioned above, results in a length of over 3.5 million words.
* ''Fanfic/TheInfiniteLoops'' as a whole falls under this, thanks to having multiple authors writing for different franchises in the universes setting and having others still contributing snips to them as well. As of putting this here, ''just'' the [[WesternAnimation/MyLittlePonyFriendshipIsMagic Friendship is Magic]] branch of the loops has gone for 198 chapters and ''2,042,068 words''. In total, the loops ranks in at +400 chapters and ''+5,000,000'' words. It's gotten to the point where the trope page has sub-pages for any compilation with more then 20 chapters; ''Fanfic/TheMLPLoops'' obviously enough, ''Fanfic/ThePokemonLoops'', ''Fanfic/TheRWBYLoops'', ''Fanfic/TheWinxClubLoops''...
* A ''Manga/Reborn2004'' fanfic series ''[[http://www.fanfiction.net/s/3954576/1/Flames-and-Family Flames and Family]]'' by [[http://www.fanfiction.net/u/1446765/madashes2ashes madashes2ashes]] is made up of four complete stories and the fifth is still ongoing. Part IV in particular contains 2,225,275 words in 161 chapters, putting it in FF.net's top 10 longest individual stories. In total, the word count for the fics goes over 3.5 million words.
* ''[[http://www.fanfiction.net/s/3455738/1/Tales_of_The_Cosmic_War_vol_1_A_Heros_Evolution Tales of The Cosmic War]]'' is a story that has three parts with a total of around 200 chapters (parts as in stories) the first one has around 1,100,000 words, the third was finished with 2,411,720 words on its own. In total, the trilogy spans 4,470,278 words.

* The second story of the ''Franchise/{{Digimon}}'' series, ''Fanfic/AStickySituation'', is called ''Secret of the 327th'' and crosses over with ''WesternAnimation/StarWarsTheCloneWars.'' Upon completion, it turned out to be 220 chapters and 2,291,357 words. The third part sits at well over 840,000 as of August 2015. And the fourth sits at over 600,000.

** ''Fanfic/PinkiePiesFourthWallVarietyShow'', a non canon Pony POV series, had all its episode collected together on [=FIMFiction=]. The end result was another 423,287 words on top of everything else.
* As of November 2016, all the works (including non-canon) in the ''Fanfic/PokeWars'' added up to a total of 4,813,057 words.
* ''Fanfic/AdoptedDisplaced'' series: As of January 1, 2017, the thirteen ''completed'' stories alone total 1,127,027 words. The series later passed the 2 million mark on May 19, 2017, with sixteen completed stories (1,531,578 words between them, with the four ongoing fics making up the difference). On top of that, the author's adding another 8,000 minimum every week. And there are more stories to come.

* Two ''Franchise/{{Danganronpa}}'' fanfiction series stand out:
** The longest so far is ''[[https://archiveofourown.org/series/1093419 Dangan Box]]'', which is a crossover between the franchise and ''Manga/MedakaBox'', totaling at 3,632,056 words and still counting.
** Before it was rebooted, the entire ''[[Fanfic/ANewHopeDanganronpa Legacy of Despair]]'' [[note]] the original timeline from A New Hope to Oasis of Despair [[/note]] totals over 2,019,894 words. It's more in line with the traditional killing game structure.
* [[https://www.fanfiction.net/u/4923772/Nan-the-Keyblade-Master Nan the Keyblade Master]]'s ''[[Fanfic/SuperRWBYSisters Super RWBY Universe]]'', as of December 16, 2022, consists of twenty-nine stories, eight one-shots, one spin-off chibi story, a story that is a collection of anthology stories, two April Fools' Day one shots, a Halloween one-shot that is no longer canon, a PSA story and a what if story collection that opens up the multiverse for Super RWBY Sisters. Altogether, this brings the word count to 4,106,735 words in total, making it one of the largest crossover, multi-story universes.

* ''FanFic/XCOMTheHadesContingency'', as well as its two sequels (''[[FanFic/XCOMTheAtlasProtocol Atlas Protocol]]'' and ''[[FanFic/XCOMTheAdventDirective Advent Directive]]'') have a total word count of 2.6M words as of April 2022. If one adds ''The XCOM Files'' to that, the word count jumps up to 3.5M words.

* ''Fanfic/ShardsToAWhole'' ([[https://www.fanfiction.net/s/8935062/1/Shards-To-A-Whole link]]) is an ''Series/{{NCIS}}'' fanfic centering around [=McGee=] and Abby but extended to show Team Gibbs evolving into [[TrueCompanions The Gibbs Family]]. On December 23rd, 2017, the story was marked as complete with a word count of 2,965,445 words spread out over 609 chapters. Then, of course, there's ''[[https://www.fanfiction.net/s/10113704/1/Shards Shards]]'', an alternate universe story which [[DeadFic died]] after 681,827 words spread out over 140 chapters; "Shards" picks up after chapter 290 of ''[=StaW=]'' and was written for readers who wanted to follow the plot beats of the main story without dealing with a primary plotline of ''[=StaW=]'''s later chapters, [[spoiler:in which Tim and Abby [=McGee=] and Jimmy and Breena Palmer [[{{Polyamory}} enter into a long-term four-way romantic relationship]]]]. Altogether, the stories amass a total of 3,647,272 words.
* [[https://archiveofourown.org/series/2840566 The Kismet Trilogy]] has only had two of the three works completed, and is already at over 3.7 million words. ''A Second Chance'' alone is the longest ''Harry Potter'' fic hosted on Platform/ArchiveOfOurOwn!
* The ''Ben 10 RWBY'' series is perhaps one of the longest {{Crossover}} [[FusionFic Fusion fics]] in both sections. The first volume, ''[[https://www.fanfiction.net/s/13050256/1/Ben-10-RWBY-Volume-1-Dimension-Twist Dimension Twist]]'', clocks in at 1,680,368 words, and the ongoing (as of May 2023) second volume, ''[[https://www.fanfiction.net/s/13854784/1/Ben-10-RWBY-Volume-2-Ultimate-Omniverse Ultimate Omniverse]]'' is at 892,330 words. It's one of the longest ''Ben 10'' and ''RWBY'' crossovers, but it then wedges in a third franchise into the mix midway with [[spoiler: ''WesternAnimation/GeneratorRex'']].
* ''Fanfic/CantGoHomeAgain'' clocked in at 636,120 words when it came to an end in May of 2016. Ever since, the ''Home'' [[https://www.fanfiction.net/s/11958681/1/Can-t-Go-Home-Again series']] [[https://www.fanfiction.net/s/12984297/1/Almost-Feels-Like-Home three]] [[https://www.fanfiction.net/s/13998534/1/Going-Home-in-a-Box stories]] have blasted past the two million words milestone, sitting, as of September 8th, 2023, at a grand total of ''2,156,867'' words ''and ongoing''. The third story, ''Going Home In A Box'', is as of this writing thirty chapters away from its' planned conclusion, and a fourth story, tentatively titled ''The Long Road Home'', is in the works.

[[folder:Over [=1,000,000=] words (single)]]
* ''Fanfic/AHollowInEquestria'' at last count is 1,235,093 words long, and is showing no signs of stopping. The author has indicated an intent to continue writing the story until it eclipses ''Fanfic/DiariesOfAMadman'' in length.
* ''Fanfic/CatRa'': Monokub just can't help himself from making each episode several quite sizable chapters. The story has 1,456,237 words over 130 chapters.
* ''Fanfic/SuperMarioWorldMaxLandis'' is a 436-page movie script that would be 7 hours long if it were made, with almost every Mario character having a supporting role, character arcs, and being name-dropped at least once.

* ''VideoGame/{{Shantae}}'': ''[[https://archiveofourown.org/works/31903162/chapters/78998827 Clash of Arms]]'', clocks at 1 717 929 words in 53 chapters.
* ''Fanfic/ImperfectMetamorphosis'' is a Franchise/TouhouProject dark fic, which, as of March 2022, has ''1,327,344'' words. It is the second longest Franchise/TouhouProject fanfic on Platform/FanFictionDotNet, as well as one of the most well-known fanfics in the Franchise/TouhouProject's western community.

* ''Fanfic/YetAgainWithALittleExtraHelp'' reached 1,262,281 words at its completion after approximately three years of work. This is all before the TimeSkip in Naruto, incidentally, and the story continues in a sequel for Post Time-Skip. Third Fang has put up roughly 1,200,000 words in a period of 900, that is 1300 words per day, everyday. this time figure does not remove the time taken up buy revisions or time spent doing other tiresome things like sleeping and eating.
* At over 1,101,000 and still ongoing as of 2018 ''Fanfic/{{Drifting}}'' is currently the second longest ''Manga/{{Naruto}}'' story on Platform/FanFictionDotNet.

* ''Fanfic/GodSlayingBladeWorks''-- A ''VisualNovel/FateStayNight''[=/=]''Literature/{{Campione}}'' crossover written by Marcus Galen Sands, where Shirou and Illya survive the Normal ending of The Heaven's Feel route via Dimension hopping and God magic.
* ''Fanfic/PrinceOfTheDarkKingdom'': At 142 chapters and 1,181,731 words certainly qualifies. A ''Literature/HarryPotter'' fic.
* ''Fanfic/YuGiOhForever'', which lives up to its name; it's a whopping ''321 chapters, 937,873 words, long.'' It also has a sequel, ''[[http://www.fanfiction.net/s/5893795/1/YuGiOh_Eternal Yu-Gi-Oh Eternal,]]'' which is 70 chapters, 451,622 words, long.
* The ''Franchise/{{Halo}}'' fanfiction ''Fanfic/TheLife'' is 230 chapters long, with 1,622,859 words in total. WordOfGod originally stated that the story would end at over twice its then-current length back when it was 550,000 words; it ended up being nearly triple that. As of August 2016, it remains the longest story in the ''Halo'' fanfiction.net archive.
* ''Franchise/YuGiOh'' fanfic ''Fanfic/SkinUsagiSquared'', as of March 2014, has passed 1.8 million words.
* ''Fanfic/SoulChess'' is complete at 208 chapters and over ''1,700,000 words''.
* The ''[[Fanfic/TheNewTrialsOfCardCaptorSakura The New trials of Card Captor Sakura and friends]]'', a ''Manga/CardCaptorSakura'' fiction that has almost 2 million words, featuring the entire returning casts of CCS as well as hundreds of original characters introduced in the story. The story features Sakura and Syaoran as they attempt to seal the dark forces as well learning more about their parents past while striving to understand the future for them and their friends.

* ''Fanfic/MushroomWars'' reached the 1 million word milestone on April 6, 2022 at it's 121st chapter. It is the longest standalone ''Franchise/SuperMarioBros'' fanfic on Fanfiction.net, clocking in at 1,242,236 words as of November 2023.

* As of January 2023 ''Fanfic/{{Eroninja}}'' clocks in at 103 chapters and over 2,307,000 words. The side-story ''[[https://ficwad.com/story/214155 Eroninja: The Limelight]]'' adds over another 174,000. Both stories are still going strong and the author intends to write at least two sequels.
* The RecursiveFanfiction ''Fanfic/FalloutEquestriaProjectHorizons'' has passed the original ''Fallout Equestria'', has been completed with over 1.7 million words. Unlike plenty of other long fanfics, it's not due to {{Padding}}; both this story and the original have editors and are regarded as good quality works.
* ''Fanfic/UniverseFalls'', as noted by the creator, is the longest ''WesternAnimation/GravityFalls'' fanfic and the longest ''WesternAnimation/StevenUniverse'' fanfic on Platform/FanFictionDotNet, with 1,701,585 words (as of October 2020), and were at the beginning of Arc 9.
* ''Fanfic/AshesOfThePast'', a ''Anime/PokemonTheSeries'' fanfiction, is over 1,913,000 words long and still ongoing as of February 2021.
* While the ''Fanfic/BloomingMoonChronicles'' are a doorstopper as a whole, two stories from the series deserve special mention: ''Glory Be'', with 1,039,124 words, and ''Hecate's Orphanage'', with 1,149,615. (It should be noted that these wordcounts are taken from the version published on Platform/FimfictionDotNet. The fanfiction.net publications have a few thousand words extra.)
* ''Fanfic/StarlightOverDetrot'' (as of January 2017) clocks in at 103 chapters and over 1,019,952 words, and is 28 chapters into its third (and possibly final) act.
* ''[[Fanfic/SilverGlowsJournal Silver Glow's Journal]]'' ([[https://www.fimfiction.net/story/317740/silver-glows-journal link]]) follows a pegasus college student from the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' universe through a year-long foreign exchange program on Earth. It wrapped up at 379 chapters (styled as short jounal entries) and 1,000,907 words.
* The ''Anime/DigimonAdventure02'' fanfic ''Fanfic/Digimon02TheStoryWeNeverTold'' was completed at 70 chapters long, with 1,038,030 words.
* As of July 2017, ''Fanfic/ForumOfThrones'', an ongoing and interactive ''Series/GameOfThrones'' fanfiction has reached the first third of its intended amount of chapters, finishing this milestone at 1,117,256 words divided over 290 parts in nine chapters. The author himself has stated that the next two-thirds of the story are fully expected to be even longer, with him intending to finish the story north of 4,000,000 words.
* ''[[Fanfic/HPAndTheJadeDragon HP & the Jade Dragon]]'' ([[https://www.fanfiction.net/s/12046790/1/HP-The-Jade-Dragon link]]) as of June 2018 has 101 chapters and over 1,121,000 words.
* ''Fanfic/ThisBites'' is the longest ''Franchise/OnePiece'' fanfic out there; wordcounts vary between the FFN and [=AO3=] versions, but both are comfortably over 1.9 million words as of the end of Part 1.
* ''Fanfic/MyHuntsmanAcademia'' has over 1,000,000 words in the main story[[note]]including technical fluff used to drive the ''TabletopGame/{{GURPS}}'' mechanics[[/note]] as well as 220,000 words of canon {{Omake}}s and 230,000 words worth of non-canon outtakes after less than a year and a half of work. It just finished Volume 1.
* ''[[https://archiveofourown.org/works/13084488 Hotel for the Broken]]'' as of February 2021 is an A/B/O ''Manga/{{Haikyuu}}'' fanfiction with over 1.9 million words, making it the longest ''Haikyuu'' fanfiction on Archive of our Own.
* ''Fanfic/{{Traveler}}'' is a ''Pokémon'' AlternateUniverseFic and PatchworkFic where Ash receives a male Nidoran instead of a Pikachu. As of October 2023, it has 71 chapters and is over 1.8 million words long.
* ''WesternAnimation/TheLoudHouse'' Historical AU ''[[Fanfic/ReelingInTheYears Reeling in the Years]]'' ([[https://www.fanfiction.net/s/12726394/1/Reeling-in-the-Years link]]) was completed on October 6, 2019 at 1,466,789 words spread out over 233 chapters.

* ''Fanfic/AColdCalculus'' is a Euphemia-themed ''Code Geass'' fic with 1304k+ words.
* ''Fanfic/{{SAPR}}'' is a crossover between ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' and ''WebAnimation/{{RWBY}}'' that has passed 1.2 million words as of the first of January, 2020, and it continues to be updated. The author claims that he mentally divides up sections of the fic into different books, but no such indexing exists on the chapter titles, and on the three websites it is uploaded to it only has a singular listing.
* ''[[https://www.fanfiction.net/s/8898479/1/Uchiha-Heiress-Remix Uchiha Heiress Remix]]'' has over 1.4 million words as of January 2023.
* ''Fanfic/AThingOfVikings'' is a ''Franchise/HowToTrainYourDragon'' AlternateHistory fanfiction, and with 1,703,162 words as of the last chapter of Book IV, chapter 154, published on April 30, 2023, the fic is officially longer than the combined length of the seven main Harry Potter books (1,084,170); while the author has broken up the story arcs into "books", they are currently aggregated as single fanfiction and thus qualify under this category.
* ''Fanfic/SonOfTheSannin'' was [[CompletedFic completed]] on March 24, 2021, with a total of 133 chapters and 1,235,733 words.
* ''Naruto'' fanfic ''Fanfic/BetterLeftUnsaid'' has just barely crossed a million words as of February 2019.
* As of November 2023, ''Fanfic/TheWeaverOption'' clocks in at over 1.7 million words, and it's regularly updated.
* ''Fanfic/AnEagleAmongLions'' is the longest ''VideoGame/FireEmblemThreeHouses'' story on Archive of Our Own, having surpassed the million-word mark on September 13, 2021, and was finished on July 29, 2022 with over 1.6 million total words across 87 chapters.
* ''Fanfic/DesperatelySeekingRanma'' is a ''Manga/RanmaOneHalf'' fanfic that clocks in at 1,426,632 words long with 98 chapters as of June 2021.
* Prior to its deletion from Archive of Our Own on May 31, 2021, the ''Literature/GrandmasterOfDemonicCultivationMoDaoZuShi'' fanfic ''Sexy Times with Wangxian'' clocked in at 1,303,981 words spread out over 304 chapters.
* The ''VideoGame/{{Undertale}}'' fanfic ''Fanfic/TaleOfTheUnderground'' ([[https://archiveofourown.org/works/7725895 link]]) clocks in at 1,254,775 words spread out over 166 chapters. It's also the second longest ''VideoGame/{{Undertale}}'' fanfic hosted on Archive of our Own.
* ''Fanfic/Trailblazer3ndless'', a ''Worm''/''Gundam'' cross-over, currently stands at 1,678,396 words, over 273 chapters, created over the course of 18 months.
* The ''Literature/HarryPotter'' fanfic ''Fanfic/NewBloodArtemisgirl'' has been reliably updated with a new chapter every Tuesday and Friday since it was first published in August 2018. While each chapter is a single scene, about as short as a chapter can get and still meaningfully ''be'' a chapter, this still adds up to over 1.3 million words as of November 2023.

[[folder:Over [=1,000,000=] words (series)]]
* ''Fanfic/TheCalvinverse'' is a very long series, with over 1,000,000 words spread across its several stories... and that's only counting the official stories!
** ''Fanfic/CalvinAndHobbesTheSeries'' alone has over 700,000 words spread out over 100 episodes.
* The ''[[http://www.fimfiction.net/story/2124/trixies-magic-bit Trixieverse]]'' [[WesternAnimation/MyLittlePonyFriendshipIsMagic MLP]] series is one million, three hundred and forty-six thousand and eight words in nine successive books, each one focussing on different character arcs and situations but continuing the larger narrative.
* The ''Franchise/MassEffect'' fanfic trilogy ''Fanfic/MassVexations'' clocks in at just under 1.4 million words. Across the entire series, two of the installments clock in at just over 600,000 words.
* ''Fanfic/ImperfectMetamorphosis'' by itself has over 1,300,000, but there's also additonal 412,694 words spread across its several spin-offs, making the {{Tropers/TakerFoxx}}'s entire series 1,722,130 words long (as of 2 June 2021).
* The ''Fanfic/TotalDramaComebackSeries'' is composed of the first saga, one of the only complete alternate-seasons at over 400,000 words, and the second fic ''Total Drama Battlegrounds'' is set to at least triple that amount with double the contestants. This is over a million words for a kids' show.
* The ''Fanfic/AlbusPotterSeries'', consisting of 7 "books", clocks in at over 1,120,000 words, about 50,000 words longer than the actual Harry Potter series.
* ''Fanfic/IronHearts'', each of the chapters in this ''[[WesternAnimation/MyLittlePonyFriendshipIsMagic MLP]]'' and ''TabletopGame/Warhammer40000'' crossover series is well over 100,000 words, with most topping 200,000 by a fair margin. Altogether, the series is roughly 1,400,000 words as of April 26 2016.
* The six-season ''Fanfic/TotalShuffledIslandSeries'' is expected to approach 1.5 million words upon completion. The shortest finished season clocks in at about 190,000 words including author's notes, and a couple top 300K.
* As of August 2020, the series ''Fanfic/DownToAgincourt'' is more than 1.1 million words in length (and that's only the first four books of a projected nine)!
** On its own, ''The Game of God'', the fourth work in the series, is itself a doorstopper, featuring 579,910 words.
* ''Fanfic/TheLoneTraveler'' spans 4 main stories and numerous side stories. 1.1 million words and still climbing.

* An ''VideoGame/{{Undertale}}'' fan fiction sireis called ''Dreemurr Chronicles'' by [[https://www.fanfiction.net/u/5180496/Ben10Extreme Ben10Extreme]] currently has 1,017,235 words.
** The bulk of it comes from the current ongoning story, ''[[https://www.fanfiction.net/s/12311874/1/Dreemurr-Chronicles-Our-New-Era Our New Era]]''. It has 692,208 as of the release of chapter 86 on August 15, 2019.
* Just the main volume of the ''Literature/Overlord2012'' fanfic ''[[https://www.fanfiction.net/s/13152722/1/God-Rising-The-Cult-of-Ainz God Rising: The Cult of Ainz]]'' is 1,046,613 words long. Add in the expanded universe of spinoffs, sequels, and supplementary material (several of which are ongoing, and with more planned), and there's another nearly 800,000 words to read in order to get the whole story.

* ''Fanfic/TheRigelBlackChronicles'' starts with "just" 220k words for book 1, but the succeeding books get longer and longer, with the fourth book being well over 400k and the whole series adding up to over 1.3 million words. It also tends toward extremely long ''chapters'', averaging over 30k words per chapter in book 4.
* ''Fanfic/TheArithmancer'' and its sequel are over 500k words each, plus another another 150k words for book 3, bringing the series total to nearly 1.3 million words.
* ''Fanfic/YugiohEQG'' is divided into four stories, 194 total chapters, and 1,008,564 words. The first story in the series is the smallest with 188,299 words, and the sequels just get bigger.
* As of June 18, 2021, the ''Franchise/StarWars'' time-travel fic ''Fanfic/TheDesertStorm'' is completed at 1,144,596 words in total with the series being split into twenty-four stories.
* ''Fanfic/ElisifTheDragonQueen'' spans three stories and consists of 1,198,084 words in total as of January 9th, 2021.
* The 5 main stories comprising the Harry Potter AU ''Fanfic/{{Dangerverse}}'' add up to 1,899,218 words. That's not taking into account the numerous recursive fanfic the author has written, which bring the word count to well over 2 million words.
* The main (completed) series of ''Fanfic/LoadedMarch'' stands at 1,261,720 words. The extras (complete stories in their own right, but the series is marked incomplete) stands at 78,394 words as of July 2021, bringing the total number of words related to ''Loaded March'' to 1,340,114. That being said, as Footloose is rewriting ''Loaded March'' as original fiction, the series is not likely to be updated.
* ''Fanfic/HarryPotterEveryoneLivesAU'' is an ongoing chapter-by-chapter rewrite of the entire ''Literature/HarryPotter'' series where, [[ExactlyWhatItSaysOnTheTin well]], EverybodyLives. As of December 2022, it's at 1,142,836 words, and still isn't quite complete.
* ''Fanfic/ShiftingLines'', another ''Harry Potter'' example, features more than 1,220,000 words as of January 2022.

* ''Fanfic/PokemonHarmonyAndChaos'' is a series divided into three main stories and three side-stories that act as "[[TheMovie movies]]". Upon its completion, all of them together make up a total of 1,206,483 words.
* ''Fanfic/InfinityCrisis'' is a collaborative MassiveMultiplayerCrossover that currently has almost 80 stories taking place in its setting for a total of 1,156,985 words.
* ''[[https://archiveofourown.org/works/34816549 No Paths Are Bound]]'' is on its own over 1.1 million words, making it on it's own the longest fic in the [[Literature/HeavenOfficialsBlessingTianGuanCiFu Heaven Official's Blessing]] category as of March 2023. Extras in the series put the completed experience at over 1.2 million words.

* ''[[https://archiveofourown.org/series/2512603 life in the margins of redemption]]'' is a WhatIf ''WebVideo/CriticalRole'' series that has Cree preventing Molly's death on the Glory Run Road and changing the course of Campaign Two. At 615,134 words, the first fic in the series had the distinction of being the longest ''WebVideo/CriticalRole'' fic hosted on Archive of Our Own as of December 2022 with the second part rapidly overtaking it a year later, putting the total word count at 1.2 million.
* Creator/Iron117Prime
** The ''Anime/FairyTail'' and ''VideoGame/DevilMayCry'' crossover series ''Fanfic/FairyMayCry'' has a total of 1,342,257 words as of November 9, 2023. The first series is 657,393 words long, while the second, ''Devil's Retribution'', exceeds it at 684,864 words.
** The ''Anime/CodeGeass'' and ''Franchise/{{Transformers}}'' crossover series ''Fanfic/CodePrime''. The first volume, ''R1: Rebellion'', clocks in at 572,197 words, while the second volume, ''R2: Revolution'', stands at 569,677. This makes for a total of 1,141,874 words.

[[folder:Over [=500,000=] words (single)]]
* [[https://archiveofourown.org/works/49698409 Broken Balance]] is a WebAnimation/{{Murder Drones}} fanfic. As of 7th of January 2024 it is over 522,830 words and 83 chapters long, making it the longest Murder Drones fanfic on the site with a word count over two times higher that the next longest fanfic of the series. It is also still ongoing.
* ''Fanfic/CertainDarkThings'': At over 810,000 words the story and is still ongoing as of November 2023.
* ''Fanfic/CheckmateAnlashok'': At over 661,000 words (counting author's notes) the main (there are are a few companion pieces) story is longer than the original ''Hunger Games'' trilogy and ''Literature/TheBalladOfSongbirdsAndSnakes'' combined.
* ''Fanfic/EbottsWake'', an ''VideoGame/{{Undertale}}'' fanfic, has a total of 598,884 words. Its actual plot probably isn't long enough to merit that, but it gets to be that long by mixing the action with SliceOfLife.
* ''Fanfic/ExercisesInGratitudeTheBarclayStreetFlood'' is the longest ''Franchise/{{Splatoon}}'' fanfic on Platform/ArchiveOfOurOwn, at well over 600,000 words and a chapter count in the triple digits.
* ''Fanfic/HogwartsExposed'' comes in at over 700,000 words. It would be much shorter if not for the rampant [[DepartmentOfRedundancyDepartment redundancy]] and {{filler}}, of course.
* ''Fanfic/FamilyOfTheShield'' is as of this moment 565,950 words and 93 chapters long. And it's still on-going.
* ''Fanfic/ShinjiAndWarhammer40K'' is 791,067 words long. It shows, too; each chapter is a veritable mountain of text. ''The prologue'' clocks in at about 54 pages in Word-format.
* ''Fanfic/{{Forward}}'', a ''Series/{{Firefly}}'' fanfic, is 508,921 words in length.
** ''Fanfic/TiberiumWars'', by the same author, looks like it's going to run a risk of hitting this as well, as it is only seventeen chapters long at this point but is clocking in at over 150,000 words, and canonically, it hasn't even finished the first of the actual game's ''five'' acts.
* ''[[Fanfic/ParToutAutreNom Par Tout]] [[http://www.mediaminer.org/fanfic/view_st.php?id=49664&submit=View Autre Nom]]'', a ''crossover'' between ''Manga/InuYasha'' and ''Manga/YuYuHakusho'' is 500,000+ words and seems nowhere near done.
* ''[[Fanfic/{{Nightfall}} Night]][[https://www.fanfiction.net/s/7422125/1/Nightfall fall]],'' a ''Naruto'' fanfic about Naruto gaining the Rinnegan, is over 800,000 words, 157 chapters, and still going strong.
* tracefan's ''Fanfic/TheDarknessWithin'', presently having over 650,000 words. It doesn't seem to be ending anytime soon.
* ''Fanfic/ADifferentLesson'', a ''Franchise/KungFuPanda'' fanfic. As originally posted, over 1100 pages; a smaller font sized version runs around 550 pages. 45 chapters, 632,000 words. And amazingly, very little of it is filler; there's just that much going on.
* ''Fanfic/NobodyDies''. 105 chapters and 626,466 words as of this writing, and will likely hit 150 chapters before its run is up.
* ''Fanfic/KyonBigDamnHero'': At the time of the [[DiedDuringProduction author's death]], the story is 632 ''thousand'' words. 1000+ A4 pages when printed, ''and the story is still not finished...''
* ''[[Fanfic/UltimateSleepwalker Ultimate Sleepwalker: The New Dreams]]'' ended in December 2016 at 115 chapters and 663,326 words in total.
** ''[[Fanfic/UltimateSpiderWoman Ultimate Spider-Woman: Change With The Light]]'', a companion series set in the same universe, is currently at 530,296 words and 89 chapters, and is ongoing.
* HVK's ''Fanfic/KingdomCrossovers''. Back when it was over 500,000 words, it was still in Traverse Town, promising an ArcFatigue probably worse than the [[Anime/DragonBallZ Namek Saga]]. Currently it is over 900,000 words long.

* ''Fanfic/AGrowingAffection'' is over 680,000 words long. At one point it was only the fifth longest ''Anime/{{Naruto}}'' fanfic on fanfiction.net.
* ''Fanfic/DauntlessAlloraGale'', a ''Anime/CodeGeass'' fanfic. It started in July 2010; by January 2012, it was at over 539,000 words in 77 chapters, and it updated at an average of once every 8-10 days. The author believed that she ''might'' finish sometime in 2012. She didn't, and it's still ongoing. As of November 2021, it is 103 chapters long and over 712,000 words.
* ''Fanfic/ThisPlatinumCrown'' is 887,118 words as of August 2019 and still not finished, though unfortunately, it appears to be [[DeadFic dead]]. Add to that that's it's a sequel to ''Fanfic/TheBestNightEver'', which is comparatively short at 53,935 words.
* ''[[Fanfic/BadBoysJEDIStyle Bad Boys,]] [[http://www.fanfiction.net/s/7599234/1/Bad-Boys-JEDI-Style JEDI Style]]'' is complete as of May 2013, breaking 908,000 words. It is the longest English-language ''Franchise/StarWars'' fic on FF.net.

* ''Fanfic/ItsNotTheRaptorDNA'' is the longest ''Franchise/JurassicPark'' fic on Fanfiction.net at 720,718 words and counting.
* ''Fanfic/TheEndOfPonies'', a ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fanfic, is already longer than the entire ''Literature/TheLordOfTheRings'' trilogy. And it's not even finished yet.
* ''Fanfic/ThreeSlytherinMarauders'' currently weighs in at 139 chapters with over 560,000 words and is yet unfinished.

* ''Fanfic/TheSevenHunters'' has a completed total of 557,205 words on Fanfiction.Net.

* ''Fanfic/MassEffectHumanRevolution'' is currently at 2 Prologues, 47 Chapters, and 3 interludes long and is 655,522 words and counting.

* By the time Tropers/{{UltraSonic007}}'s ''Digimon'' FixFic ''Fanfic/Zero2ARevision'' is finished, the story tops at 583,698 words in 60 chapters.

** A piece of RecursiveFanfiction, ''[[http://www.fimfiction.net/story/17890/fallout-equestria-starlight Fallout Equestria: Starlight]]'' managed to surpass it at 658,527 words.
* ''Fanfic/NewReality'' breaches 500,000 words by chapter 64 and still ongoing, not counting the non-canon continuations of it.
* ''[[http://www.fanfiction.net/s/3368694/1/The-Silent-Kingdom The Silent Kingdom,]]'' by [[http://www.fanfiction.net/u/375558/Freedan-the-Eternal Freedan the Eternal.]] A sequel to ''VideoGame/TheLegendOfZeldaTwilightPrincess'' that changes one significant thing about the game's ending (Midna unable to regain her true form), it has been ongoing since January 2007. The author originally planned the story to be 100 chapters... yeah, right, it has gone pretty far beyond that. As of Oct. 2013 it is over 130 chapters and has broken 900,000 words. At least it's finally approaching the FinalBattle... very slowly, that is. The crazier thing is that the author had also been planning to write a {{Prequel}} detailing the backstories of some of the [=OCs=] in this fic, but scrapped that idea as it would take too much time. The important parts of this planned prequel were incorporated into the fic as flashbacks. The story finally wrapped up at 986,000+ words and 140 chapters on October 3, 2015.
* ''Fanfic/WheelsTowardsWhatever'' ([[https://archiveofourown.org/works/31757254 link]]) surpassed 500k words on it's 172nd chapter and is the longest ''VideoGame/HollowKnight'' fanfic on Archive of Our Own as of January 27, 2022.
* ''[[http://www.fimfiction.net/story/90558/the-night-is-passing The Night Is Passing]]'', a ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fic, spanned 525,509 words before ending.
* ''Fanfic/AMatchMadeInHell'', by Creator/RI2 weights in at 602,067 words.

* [=ScytheRider's=] ''Fanfic/PokemonMysteryDungeonSilverResistance'' weighing in at 995,777 words (as of December 2022).
* ''Fanfic/TheLongRoad'', a ''Anime/DragonBallZ'' fanfiction, clocks in at just over 700,000 words ''and counting''. One of the most recent chapters singlehandedly clocked in at ''40,000'' words alone, which is a pretty decent number for a single fanfiction.
* ''Roleplay/DigimonWorldInfamy'' is currently at around 500,000 words (as of May 2017). Impressive given that it started in Feburary 2017 and updates daily.
* ''Fanfic/SailorMoonZ'' may only have had 25 chapters, but when the later chapters are themselves the length short novels (Episode 20 alone is 56,000 words long), the fic still is still well over 650,000 words in total.
* The ''Anime/DragonBallZ'' fanfic ''Fanfic/BreakThroughTheLimit'', which surpasses 850,000 words in length. Though then again, some chapters have a rather lengthy Q&A section.
* ''Fanfic/NewChance'' is over 630,000 words long.
* As of April 2019 ''[[https://www.fanfiction.net/s/12104688/1/Whispers-in-the-Night Whispers in the Night]]'' has over 715,000 words and 56 chapters.
* ''Fanfic/FutureTalk'', completed as of 15 August 2016, at a whopping 105 chapters, with 862,222 words.
* As of July 2018 ''[[https://www.fanfiction.net/s/9822580/1/The-Girl-Who-Was-Behind-The-Curtain The-Girl-Who-Was-Behind-The-Curtain]]'' has over 750,000 words and 130 chapters.
* ''Fanfic/TotallyLosingIt'' is over 560,000 words and has gotten to the half-way point of ''VideoGame/MassEffect1''.
* As of May 2018, ''Fanfic/DreamingOfSunshine'' has 692,018 words and 145 chapters. This SelfInsertFic has no signs of ending soon, either.
* The ''VideoGame/DungeonKeeper''/''Franchise/SailorMoon'' crossover ''Fanfic/DungeonKeeperAmi'' is over 810,000 words as of May 2021.
* ''Fanfic/BestKeptSecret'' is an on-going (as of July 2021) ''Franchise/FullmetalAlchemist'' fic that's over 500k words.
* ''Literature/TheSilmarillion'' story ''Fanfic/ABoyAGirlAndADogTheLeithianScript'' clocks at 560,494 words on Fanfiction.net. And that is only a small fraction of the fanfic!
* ''Fanfic/PurpleDays'', as it gears for its final arc, is around 570,000 words long.
* Author Jay David wrote several ''WesternAnimation/MyLittlePonyEquestriaGirls'' stories, mostly one-shots, that he eventually collected into a single story, titled ''[[https://www.fimfiction.net/story/219801/equestria-girls Equestria Girls]]''. Final word count: 517,168.

* ''[[https://www.fanfiction.net/s/4506329/1/The-Shy-Newcomer The Shy Newcomer]]'' is a ''Harvest Moon: More Friends of Mineral Town'' fic that began in 2008. As of July 2023, it is 637k+ words long.
* As of this writing, ''Fanfic/GuardiansWizardsAndKungFuFighters'' is 715,680 words long and still ongoing.
* ''[[https://archiveofourown.org/works/11546595 Blind Man's Bluff]]'' is a ''VideoGame/Left4Dead2'' Nick/Ellis fanfic that clocks to over 970,000 words, currently at ''316 chapters'' and counting.
* The ''Franchise/{{Danganronpa}}'' and ''VisualNovel/ZeroEscape'' crossover fanfic ''[[https://archiveofourown.org/works/11965917/chapters/27058647 Danganronpa: Operation V.K.]]'' is almost 800k words spread across 104 chapters (including ''four'' quite lengthy epilogues).
* The longest single ''Fanfic/{{Dangerverse}}'' story, Surpassing Danger, clocks in at 519766 words to close out the series.
* ''Fanfic/DragonballZLegacies'' is a ''Franchise/DragonBall'' AU fic that follows a post-Cell Games Gohan as he takes on his father's mantle as Earth's protector. It is completed at 871,485 words long.

* ''Fanfic/AgainstTheMoon'' is another Harry Potter Marauders-era fic, this one over 850k words.
* The ''Franchise/MyHeroAcademia'' fanfic ''Fanfic/AHeroRises'' sits at 817,220 words in length as of November 2023.
* ''Fanfic/PokemonAMarvelousJourney'' began in August 2015 and ended in November 2021, at 903k words long.
* As of August 2023, the ''WesternAnimation/SouthPark'' [[MisterSeahorse Omegaverse]] fanfic ''[[https://archiveofourown.org/works/23221027 Rise]]'' clocks in at 701,479 words spread out over 58 chapters. This makes it one of the longest, if not ''the'' longest, ''WesternAnimation/SouthPark'' fanfics hosted on Archive of our Own.
* ''Fanfic/OurNewRoommate'', a ''Manga/MyHeroAcademia'' HaremGenre fanfic, is 729,487 words long.
* ''Fanfic/CheatingDeathThoseThatLived'': The story has long chapters (77 altogether) and, at 600,815 words (counting author's notes), it is almost as long as its fan fiction inspiration ''Fanfic/TheVictorsProject'' (itself a {{Doorstopper}}) and the original ''Literature/TheHungerGames'' Trilogy ''combined''.
* ''Fanfic/FalloutGirls'', a crossover between ''WesternAnimation/MyLittlePonyEquestriaGirls'' and ''VideoGame/Fallout3'', ongoing at over 715,000 words as of October 2023.

* ''Fanfic/HarryIsADragonAndThatsOK'' is over 716,000 words long and was completed in 2021.
* ''Fanfic/HarryPotterAndTheMotherWhoLivedFanfic/TheChosenSix'' is over 800,000 words long and as of November 2023 still ongoing.
* ''Fanfic/HarryPotterAndTheMotherWhoLived'' is over 944,000 words long and as of November 2023 still ongoing.
* ''Fanfic/YuGiOhDarkMessiah'' is over 553,000 words long and was completed in 2007.
* As of July 2023, the ''WesternAnimation/SouthPark'' fanfic ''Fanfic/MostlyYouJustMakeMeMad'' ([[https://archiveofourown.org/works/39037140 link]]) clocks in 519,221 words spread out over 128 chapters.
* ''Fanfic/ThePrincesSecret'': 81 chapters, weighing in at slightly over 700,000 words.
* ''Fanfic/{{Marigolds}}'' is 646,820 words and ongoing as of December 2023.
* ''Fanfic/NoChanceForFate'': This ''Anime/SailorMoon'' and ''Manga/RanmaOneHalf'' crossover has finished at over 600,000 words spread over 48 chapters.

[[folder:Over [=500,000=] words (series)]]
* The ''Fanfic/ForTheWantOfANail'' series is a series of ''Manga/MyHeroAcademia'' fanfics, with the titular nail being Izuku never receiving One For All, thus remaining [[UnSorcerer Quirkless]]. As of December 1st, 2021, the series clocks in at 744,837 words.
** ''Fanfic/ViridianTheGreenGuide'' is the longest fic in the series by a significant margin, finishing at 272,617 words over 120 chapters.
** The second longest, ''Fanfic/DekuIThinkHesSomePro'', is no slouch in word length either, at exactly 191,001 words over 94 chapters.
* ''[[https://archiveofourown.org/series/495916 The Components of Construction]]'' is a ''Franchise/MarvelCinematicUniverse'' AU fic that follows the adventures of a {{Gender Flip}}ped version of Tony Stark by the name of Natasha Antonia "Toni" Stark. As of March 2020, the ''nineteen''-part series consists of the main installment, ''The Limitations of Wax'' (a 222k word Doorstopper on its own), a PerspectiveFlip short story, and seventeen AU stories of a fanfic that is already itself an AU, totalling nearly 522k words.
* Razor Knight's ''Cyber Moon'', a ''Franchise/SailorMoon''-based epic trilogy, parts [[http://www.fanfiction.net/s/3214362/1/Cyber_Moon_Part_1_Genesis one,]] [[http://www.fanfiction.net/s/3214402/1/Cyber_Moon_Part_2_Chronicles two]] and [[http://www.fanfiction.net/s/4639525/1/Cyber_Moon_Part_3_Crystal three.]] Total length: over 600,000 words.

*** Total word count: ''886,710 words''. She is currently now writing a story she calculates will have four parts to it with around thirty chapters. Each.

* ''Fanfic/FromFakeDreams'' -- a ''VisualNovel/FateStayNight'' Alternate Universe Fic written by Third Fang, author of the incredibly long ''Fanfic/YetAgainWithALittleExtraHelp''.
* Rytex's ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' series centering on Nova Shine and Twilight Sparkle.
** ''Fanfic/TheApprenticeTheStudentAndTheCharlatan'' clocks in at over 382,000 after undergoing an extensive rewrite of the first 14 chapters, plus some additions. Its original complete version finished at 242,811. Even as far as single chapters go, Chapter 17 ("Nightfall") is ''over 25,000'' words long, and the rewrite of Chapter 12 got to 28,000 before it was split into two parts.
** Its original sequel, ''Even In Other Worlds'', is sitting at just over 200,000 words, however just under 40,000 words of it are AprilFoolsDay chapter updates (including one update that is all 22k+ words of ''Fanfic/MyImmortal'').
** The new sequel, ''Fanfic/TheArchmagesLastBow'', is a little over 150,000 words long at ten chapters into the story.

* ''Fanfic/TheDarknessSeries'' -- when both stories are taken together it puts it at over 500,000 words.
* [[http://www.fanfiction.net/u/1229282/Kryalla_Orchid Kryalla Orchid's]] E'ara Series. The main trilogy is nearly 580,000 words, plus about 60,000 in connected one shots.
* The ''WesternAnimation/StevenUniverse'' Fanfic/OpalAU SeriesFic ''Fanfic/OpalSapphireRubyAndSteven'' was discontinued on March 11th, 2021 with a total of 665,083 words spread out through three installments.
* ''Fanfic/RomanceAndTheFateOfEquestria'' is a long fic, reaching 494,049 words and 195 chapters by May 2019. It also has a prequel, ''Legend of the Goddesses'', which sits at 140,285 words and 58 chapters at the same time, totaling over 600,000 words. The first is still ongoing.
* [[https://www.fanfiction.net/u/4642076/TheBaneOfHumanity The Bane of Humanity's]] Avatar/Legend of Korra/Transfomers crossover is a measurable series to read in pieces, ranging between 80,000 and 155 thousand words. However, put all 5 stories together, and you have a solid series just measuring over 500,000 words.
* Together, the three installments of ''Fanfic/MegsFamilySeries'' surpass half a million words.
* ''Fanfic/TriptychContinuum'': The first story, ''[[Recap/TriptychContinuumTriptych Triptych]]'' is over 513,789 words, and there are more than 65 entries in the series.
* Claymade's ''Manga/RanmaOneHalf''-''Anime/SailorMoon'' crossover, the ''Fanfic/TheDarkLordsOfNerima'' series, has close to 700,000 words as of February 19th, 2019. ''The Dark Lords Ascendant'', the third entry, is a door stopper on its own with 387,000 words.

* ''[[https://archiveofourown.org/series/179561 Heart of the Storm]]'' is a five-part ''Franchise/MarvelCinematicUniverse'' AU fanfiction centering around a romance between Steve Rogers and Natasha Romanov. The five parts steadily climb in length from 97k all the way up to 290k words, for a grand total of 863k words. The author proved rather prolific with this story, as well- from start to finish, it ran from July 2014 to September of the following year.
* As of May 2023, the ''Fanfic/AManOfIron'' series consists of three books (with a fourth planned) and is over 597,000 words long.
* As of April 15th, 2022, the ''Fanfic/OhRhonda'' trilogy has amassed a total of 822,928 words.
* ''Fanfic/TheAccidentalAnimagus'' is by itself 697,191 words. It's sequel, ''Animagus at War'', is still being updated and currently sits at 217,963 words as of May 2023. Add in the extra oneshots (which combined are at 26,933 words) and you have a series of 942,087 words!
* ''Fanfic/TheVictorsProject'' is by itself over 300,000 words. Combine that with the other long-form works in the same 'verse, namely ''The Lumberjack and the Tree Elf'', ''Fall Into the River'', and ''The Bonds of Blood'' as well as the three shorter fics, and you have a series just over 650,000 words.

* ''Fanfic/HarryPotterAndThePowerOfTheDarkSide'' and its sequels clock in at over 994,000 words.

[[folder:Over [=250,000=] words]]

* While ''Fanfic/EightMercenariesAndAToddler'' only sits at 58,262 words spread out over 18 chapters, its first sequel ''[[https://www.fanfiction.net/s/8605925/1/I-ll-Be-Home-for-the-Holidays I'll Be Home for the Holidays]]'' sits at 108,667 words spread out over 25 chapters. Meanwhile, its second sequel ''[[https://www.fanfiction.net/s/9894404/1/Machines-Don-t-Bleed Machines Don't Bleed]]'' sits at 242,206 words spread out over 38 chapters. Altogether, they amass a total of 409,135 words.

* While we're at it, one particularly high quality fanfic in the ''WesternAnimation/SWATKats'' section is ''[[http://www.fanfiction.net/s/3849671/1/SWAT_Kats_Endgame Endgame]]'', which is now completed at 473,822 words and 70 chapters! (for those who beancount, that's 6768.8 words per chapter nearly) as of November 13, 2010. And [[http://www.fanfiction.net/u/556935/KantoTheSlayer the author]] has no intention of quitting now. Good thing it's an action fic rather than furporn. Now, the sequel, ''[[http://www.fanfiction.net/s/6474870/1/MegaKat_Shield MegaKat Shield]]'' is underway!
* ''[[https://www.fanfiction.net/s/12154466/1/Overlordly-broken Overlordly broken]]'', the longest ''Literature/{{Overlord|2012}}'' fanfiction yet, has finished at 379,993 words and only 24 chapters, and is currently undergoing a rewrite which already has 115,304 words at 9 chapters.
* Thunderblade's ''[[http://www.fanfiction.net/s/1605452/1/Battle_of_the_Sacred_Essences Battle of the Sacred Essences]]'' is "only" 252,754 words, but it still comes out in excess of 400 pages when printed.
* ''Fanfic/ADragonsJourney'' is a ''My Little Pony: Friendship is Magic'' fic of 385,025 words.
* ''Fanfic/EventHorizonStormOfMagic'' currently consists of two "Books" that collectively number over 260,000 words: the Prologue and ''Book One''. Books Two and Three are in the works.
* ''[[http://www.fanfiction.net/s/2426552/1/Kim_Possible_Mind_body_and_Soul Mind, Body, and Soul,]]'' a ''WesternAnimation/KimPossible'' fanfiction that's NSFW, clocks in at 450,669 words, and has a sequel being written that's three chapters long and 70k+ words already.
* ''VideoGame/DissidiaFinalFantasy'' fanfiction ''Fanfic/ShardsOfMemory'' ended at 41 chapters and over 275,000 words. The epilogue itself almost hits 17,000 words, twice the length of even the longest chapters up until then.
* The appropriately named ''Dissidia'' fanfic [[http://www.fanfiction.net/s/6998997/63/An-Unending-Struggle "An Unending Struggle"]] is up to 360,000 words over 63 chapters, and is still going.
* The ''WebAnimation/{{RWBY}}'' fanfic ''Fanfic/WeissReacts'' Volume One ended at 314,860 words and is currently on its second volume.

* Superstarultra's ''Fanfic/YouGotHaruhiRolled''. Over 300,000 words long and still not done. Even more amazing, it's currently 86 chapters long, but individual chapters were still pretty short until chapter 72. A very large percentage of its length is in the last few chapters.
* ''Fanfic/ConstantTemptation'', a ''Manga/DeathNote'' fanfic has 102 chapters and is over 300,000 words. That's not counting the Sequel and the Deleted Scenes...
* ''Fanfic/{{Hitchups}}'' is 40 chapters long, with 307,928 words that make up the entirety of the fic. For some time it was the second-longest ''Franchise/HowToTrainYourDragon'' story on ff.net after ''The Truth is a Shard of Ice'' by [=Whitefang333=], though it's since been surpassed by other stories.
* ''Webcomic/{{Homestuck}}'' fic ''Fanfic/HerdingCats'' is over 460,000 words spanning 31 chapters.
* A fanfiction based on ''Franchise/{{Frozen}}'' called ''[[http://www.fanfiction.net/s/10142141/1/Elsa-s-Year Elsa's Year]]'', as of December 2014, is already over 300,000 words long - and still ongoing (though on hiatus).
* The ''Franchise/{{Frozen}}'' fanfic, ''Fanfic/FrozenWight'' is 82 chapters and over 310,000 words long. ''And'' it has sequel fics, albeit ones much shorter in length than the original fic.
* ''Fanfic/ADelicateBalance'' is a deliberately paced [=TwiJack=] fic that takes its time. At 36 chapters and 289,001 words long, it's been completed.
* ''[[http://www.fanfiction.net/s/576930/1/Mega-Man-X-Terrornova Mega Man X: Terrornova]]'' is ''almost'' 500,000 words long (496,862 to be precise).

* ''[[Franchise/TheDCU DC Universe fanfiction]]'' ''Fanfic/KaraOfRokyn'' sits at 274,020 words spread over 51 chapters.
* The Russian ''WesternAnimation/GravityFalls'' fanfic ''[[http://archiveofourown.org/works/8237857/chapters/18878848/ Black Book of Reverse Falls]]'' clocks in at 300,854 words over seventy-four chapters.
* ''Fanfic/NecessaryToWin'', a ''Anime/GirlsUndPanzer'' and ''{{Manga/Saki}}'' crossover, is over 290,000 words long and is not yet complete, making it longer than any work in either fandom on Fanfiction.net.
* ''Fanfic/BackgroundPony'', by the author of ''The End of Ponies'', clocks in at 20 chapters at over 430,000 words.
* ''[[http://www.fanfiction.net/s/7453553/1/bAnthem_b_of_bOur_b_bDying_b_bDay_b/ Anthem of Our Dying Day]]'' has a whopping 442,220 word word count, with chapters regularly clocking at 10,000+ words. It has, however, went on a permanent hiatus because the author found it too hard to find his way around the convoluted plot.

* ''[[https://www.fanfiction.net/s/9961293/1/The-Legend-of-Zelda-The-Circle-of-Destiny The Legend of Zelda: The Circle of Destiny]]'' is 475,475 words over 117 chapters as of 2015.
* ''Fanfic/VacationFromTheNorm'', a ''WesternAnimation/KimPossible'' fanfic, currently sits at over 450,000 words spread over two books. There's at least one more book planned in the series and the second book isn't finished yet.
* ''Fanfic/MyFamilyAndOtherEquestrians'': 373,183 words, 83 chapters and 18 interlude chapters, finished in 2015.
* ''Fanfic/AllAmericanGirlShinzakura'''s "Book One" is over 430,000 words long. There's also the accompanying collection of side stories, ''Be Human'', which has almost 300,000 words. (This is as of November 2017.)
* ''[[http://www.fimfiction.net/story/259631/a-second-chance A Second Chance]]'' is a PeggySue fic where [[WesternAnimation/MyLittlePonyFriendshipIsMagic Twilight]] is catapulted back to the first episode. It got to 305,612 words before the author decided to end it.
* ''Fanfic/TheImmortalGame'', a ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fic, lasts a respectable 297,951 words.
* ''Fanfic/{{Green}}'' is an exceptionally long fic focusing on a romance between Rarity and Fluttershy, among other pairings, finished at 475,032 words in 2017.
* ''Fanfic/TheLegendOfTotalDramaIsland'', a reimagining of ''WesternAnimation/TotalDrama'''s first season, is on course to be around 400,000 words upon completion. The author has a [[DescriptionPorn richly descriptive]] style, and a high word count is the price of that.

* The longest ''WesternAnimation/MiraculousLadybug'' fics on Platform/ArchiveOfOurOwn are:
** ''Fanfic/BackToUs'', at 446,244 words spanning 37 chapters (a one-shot {{interquel}}, ''[[http://archiveofourown.org/works/8316991 What Are Friends For?]]'', adds another 6252, while another side-story, [[http://archiveofourown.org/works/11383557 Not Your Choice]]'' adds another 1357).
** ''Fanfic/SerendipitousFate'' is in second place at over 295,000 words long spanning 22 chapters, and only about two thirds complete.
** ''[[http://archiveofourown.org/works/5575858 A Witch's Familiar]]'' is in third place at over 256,000 words spanning 56 chapters so far.
* ''Fanfic/InvaderZimTheSeries'' clocks in at 429,062 words.
* The ''WesternAnimation/FamilyGuy'' fanfic ''Fanfic/TheSpellbook'' is over 284,000 words long, and is the longest ''Family Guy'' fanfic on FFN.

* ''[[http://archiveofourown.org/works/2062614/chapters/4483347 Hermione's Furry Little Problem]]'' has over 412,000 words and 189 chapters.

* ''Lotus Jewel'', the main book of the ''Zelda'' fanfic series ''Fanfic/TheirBond'' is 90 chapters and has almost 300k words.
* ''Fanfic/MySisterLeni'' ended at almost 275k words. It's 52 chapters long.
* ''Fanfic/{{Exoria}}'': At 385,621 words at its 30th chapter, it goes beyond the 100,000 words necessary for the trope.
* The ''Frozen'' fic ''Fanfic/AnArmAndALeg'' is over 430k words long and spans over 90 chapters.
* ''Fanfic/QueenOfAllOni'' ends up being 302,460 words long, spread over 29 chapters.
* Dark Mark's ''ComicBook/{{Supergirl}}'' story ''Fanfic/HellsisterTrilogy'' is 399,502 words spread over 62 chapters as of November 2022.
* ''Fanfic/ProjectPowerpuffDeclassified'' is 453,263 words long, spread throughout 137 chapters.
* ''Fanfic/TheNewAdventuresOfInvaderZim'' is a multi-volume SeriesFic, of which Season 1 clocks out at nearly 233,000 words, while the currently ongoing Season 2 is already nearly 176,000 words, bringing the series to nearly 409,000.
* ''Fanfic/{{Essence}}'' is a ''Pokémon'' fanfic where Ash has a Growlithe starter. It has 393k+ words spread over 12 chapters as of April 2016.
* ''Fanfic/{{SPECTRUM}}'', by the time Act Two is finished, clocks in at around 490k words. Chapter Thirteen ''alone'' is 46,000 words long.

* As of August 8, 2023, ''VideoGame/TeamFortress2'' fanfic ''[[https://archiveofourown.org/works/2531561 Sinner's Fire]]'' clocks in at 358,159 words spread out over forty-six chapters.

* ''Fanfic/UnbreakableRedSilkenThread'': As of September 2021, the story is on its thirty-third chapter and 434,209 words long. According to the author, the story may in fact become the longest ''Total Drama'' fanfiction on Fanfiction.net.
* ''Fanfic/YesterdayUponTheStair'', a ''Manga/MyHeroAcademia'' fanfic, clocks in at 424,070 words.
* ''Fanfic/RemnantInferisDOOM'' sits at 40 chapters and almost 387,000 words and is still ongoing.
* As of this writing, ''Fanfic/DontLoseYourHeart'' is roughly 490,000 words across 162 chapters and shows no sign of slowing down.

* At over 620k words, ''Fanfic/SpellboundLilafly'' is the second-longest ''WesternAnimation/MiraculousLadybug'' fanfic on Platform/ArchiveOfOurOwn as of October 2023.
* Upon completion, ''Fanfic/ForTheGloryOfIrk'' ended up at 371,911 words across 66 chapters.
* ''[[https://archiveofourown.org/works/18413639 Bearing the Weight of Happiness]]'', a ''Anime/BangDream'' fanfic on Archive Of Our Own, currently stands at 404,714 words as of July 21st, 2021.
* Season 1 of the ''Fanfic/JWITCHSeries'' winds up being 482,254 words long. Season 2 is currently ongoing as a separate fic.
* ''Fanfic/{{Dalton}}'' stands at 442,058 words and 28 chapters as of July 2021.
* ''Fanfic/MythsAndBirthrights'' consists of 46 chapters and 406,452 words after a rewrite. There are several (shorter) side stories as well.
* ''Fanfic/TheBoyWithoutAFairy'', the first installment of ''The Hero of Time's Fate'', is over 440,000 words. With the sequel in progress, this series will probably get longer.
* ''Fanfic/AnAuntsLove'' is over 385,000 words.
* ''Fanfic/ForADiamondIsAMarveledThing'' ended at 388,115 words in length. The notes even mention that it's "officially longer than Harry Potter And The Order Of The Pheonix, The Fellowship Of The Ring, The Silmarillion, and the entire Hunger Games trilogy."
* ''Fanfic/AdventuresOfASuperFamily'', completed in 2023, is over 476,000 words at 115 chapters.
* ''Fanfic/AndSoWeFight'' is just under 320,000 words long.
* As of June 2023, ''Fanfic/PokemonCrossing'' is over 307,000 words. Currently it's the third-longest VideoGame/AnimalCrossing fanfiction on [=AO3=]. Several side-installments brings the series to over 310K words.
* ''Fanfic/ReadTheFinePrintEvangelion'', found [[https://archiveofourown.org/works/31141643/chapters/76951013 here]]. 283,256 words spread over forty-four chapters as of July 2023.

* The ''Literature/HarryPotter'' fic ''Fanfic/DaphneGreengrassAndTheBoyWhoLived'' is at over 465,000 words.
* ''Fanfic/{{Eleutherophobia}}'', which has been continually published since 2014, has 15 books (most of which are only one chapter) and over 320,000 words.
* As of June 30, 2023, ''[[Fanfic/ReAssessments Re: Assessments]]'' ([[https://archiveofourown.org/works/34883659/chapters/86861347 link]]) is one of the longest ''VideoGame/{{Psychonauts}}'' fanfics hosted on Archive of our Own at 287,737 words spread out over 45 chapters.
* As of July 2023, ''Fanfic/EyesOnMe'' adds up to a total of 307,990 words spread out over nineteen entries.
* ''Fanfic/TwelveMoonsAndAFortnight'' 290,000 words on its own. Other entries in the series leave the TMAAF-verse at 491,025 words and counting.
* ''[[https://www.fanfiction.net/s/8149841/1/Again-and-Again Again and Again]]'', a GroundhogPeggySue fic with Literature/HarryPotter, is over 335,000 words long and it's still ongoing.
* ''Fanfic/{{Blindness}}'' is over 324,000 words long and was completed in 2018.
* ''Fanfic/TheElementsOfFriendship'' is an AU of ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' that expands on canon and hardens the struggles of the main characters, and so far is over 400,000 words long.
* ''Fanfic/TheStoryOfTwilightGlow'' is over 366,000 words long and as of May 2023 still ongoing.
* ''Fanfic/ChrysalisVisitsTheHague'' passed the 250,000 word threshold in 2018, and it's still ongoing.
* The Transformers fanfic ''Fanfic/MisalignedGemini'' is over 300,000 words long and was completed in 2022.
* ''[[https://www.fanfiction.net/s/13023972/1/Order-of-the-Otter Order of the Otter]]'', a ''Franchise/HarryPotter'' fanfic, is over 445,000 words long and it's still ongoing.
* ''[[https://www.fanfiction.net/s/13225250/1/Three-Strikes Three Strikes]]'', a ''WesternAnimation/{{Zootopia}}'' fanfic, is over 360,000 words long and as of October 2023 still ongoing.
* ''[[https://archiveofourown.org/works/24381499/chapters/58807216 The Hunter From America]]'', a ''Manga/DemonSlayerKimetsuNoYaiba'' fanfic, is over 415,000 words as of October 2023.
* ''Fanfic/WatershipDownTheNewWorld'' is over 400,000 words long.
* As of April 2023, there is a ''VideoGame/ResidentEvilVillage'' fanfic known as ''[[https://archiveofourown.org/works/31173221 She Who Waits In The Dark]]'' that sits at 331,070 words spread out over 23 chapters. The series isn't done yet and likely won't be for several chapters.
* ''Fanfic/LoyaltyAmongWorlds'' was completed on May 19, 2022, at 271,738 words spread out over 71 chapters.
* As of November 2023, the ongoing ''VideoGame/MegaManZero'' and ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fanfic ''Fanfic/ManehattansLoneGuardian'' totals 276,000 words over 60 chapters, and is the longest ''Franchise/MegaMan'' crossover on Platform/FimfictionDotNet.
* ''Fanfic/StevenUniverseAlternateFuture'' and its sequel stories total at 497,030 words across six stories as of the final chapter of its GrandFinale.
* Fanfic/SunsetsIsekai: : The current word count as of March 29nd, 2024, is 462,661. This is across 109 chapters, the longest of which, which happens to be the hundredth, is 12,297 words. With no end to the story in sight, the 500,000 word mark is not far away.
* ''Fanfic/GoingAnotherWay'': This ''Anime/NeonGenesisEvangelion'' story has finished at over 450,000 words spread over 44 chapters.

[[folder:Under [=250,000=] words]]
* ''Fanfic/PowersOfInvisibility'' is the second longest completed ''WesternAnimation/MiraculousLadybug'' story on Platform/ArchiveOfOurOwn at 246,310 words and it's currently in fourth place overall. A sequel and some one-shot followups have been announced.

* ''Fanfic/TheSecondTry'' totals 211,058 words, not counting the sequels.
* ''Fanfic/ProjectSunflower'' is another ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fic that reached 242,202 words. Its sequel has broken 100,000 words as of April 2016 and is still ongoing.

* ''Fanfic/OversaturatedWorld'': ''Group Precipitation'' is 154,476 words long, as of its 333rd chapter.
* ''Fanfic/TheDreamlandStory''. It's 87 (gradually-increasing-in-length) chapters, and 140,168 words, long, made even crazier by the fact that it's a ''VideoGame/{{Kirby}}'' fanfic. (And it ''works!'')

* ''Fanfic/TotalDramaIslandByGilbertAndSullivan'' is a borderline case. Although it's "only" about 120,000 words including the supplemental materials, the PDF version clocks in at right around 500 pages because so much of its content is poetry (song lyrics) which is notorious for using page space inefficiently. The 700 ''WesternAnimation/TotalDrama Island'' screenshots put a goodly percentage of that white space to use, though.

* ''Fanfic/AGlassOfWine'': The original story clocks at 115,236 words spread over 22 chapters. The second version was completed at 198,045 words over 38 chapters.

* ''Fanfic/BecomingATrueInvader'' in total is just short of 225,000 words.
* The ''Series/RedDwarf'' fanfic ''[[Fanfic/TheFiftyShadesSeries Fifty Shades Of Smeg]]'' The original fic comes in at a decent 120,158 words making it the third-largest Red Dwarf-related fanfic on [=A03=]. It's also the first in a series which has a total word count of 184,824 words.
* The [[https://www.fanfiction.net/s/2018312/1/The-Starr-Chronicles original version]] of ''Fanfic/TheSuperStarrChronicles'' is nearly 175,000 words long and reached over 110 chapters before the author forgot about the story, rediscovered it, and decided to remake it.
** As of February 2023, the remade version has sixteen chapters, and it is already over 90,000 words.
* As of November 2023, ''Fanfic/TommyPicklesTheTerribleTwos'' clocks in at 245,991 words spread out over 191 chapters.
* ''Fanfic/CorAutemAurora'', a ''Franchise/KingdomHearts''/''VideoGame/FinalFantasyXV'' FixFic, is at over 185,000 words as of July 2023.
* As of March 2023, the ''VideoGame/{{Psychonauts}}'' WhatIf fanfic ''Fanfic/LaterTraitor'' clocks in at 191,621 words spread out over 40 chapters.
* ''Fanfic/ThrowAwayYourMask'' is 233,865 words as of January 2024, with 40 of 101 chapters currently published.

* ''Fanfic/TheUnitySaga'', a ''Star Wars''/''Star Trek'' crossover that runs a total of 250 chapters. Most of the chapters have a manageable size, but the final entries in each of the six parts suddenly balloon to a very intimidating length.

* ''Fanfic/TeachingDarkness: Memories'' by RaeLogan, is over 206,000 words, and itself is PART 5 in a series, with the previous story at only a little over 52,000 (at least a quarter of its sequel's size!) and the currently in progress part 6 at over 137,000 as of January 27th, 2012. The fanfic series itself has sidestories (for ideas decidedly too short compared to the main stories to focus a multichapter story around, regarded as a different canon, except maybe the ''Twilight Zone''-esque one), about seven posted scrapped unfinished stories (released as Deleted Scenes), and several fan written stories, which, if compiled into one volume would be considered a Doorstopper. Sometimes jokingly referred to [[OverlyNarrowSuperlative THE Largest Fanfic Series Centered Around A Scrapped Character In A Game That Never Happened]]. Who? Mephiles the Dark from [[VideoGame/SonicTheHedgehog2006 Sonic '06]]... VERY loosely.

* ''Fanfic/BloodThatFlows'' is, without a question, the longest ''Franchise/LyricalNanoha'' fanfic on Fanfiction.net. Over 300 chapters alone and over 830,000 words. The only ''Nanoha'' fanfic that comes close is the ''Fanfic/DevaSeries'', where, if you add up all four parts, there are more words than ''Blood That Flows'', but it still has less chapters. Of course, the latter is a pure ''Nanoha'' AlternateUniverseFic, while the former is a crossover with ''Literature/{{Slayers}}'' that pulls plotlines from both series.
* ''Fanfic/TheNeoDominoPurge'' is putting up a challenge for the longer ''Franchise/YuGiOh'' fanfics - currently at 364,981 from 36 chapters. And still ''setting up the Dark Signer arc''. TheRemake is 94,882 words from 6 chapters. Altogether; 459,863 and counting.
** From the same author, ''Fanfic/{{Override}}'', a ''Anime/CardfightVanguard'' fanfic weighing at just under 160,000 words from just 11 chapters, giving it a greater average words per chapter than the first version of ''Neo-Domino Purge''. And it's just getting started. Judging by the author's writing, it won't be long before it climbs into the same kind of league as the above.
* A kitten fic trilogy, focusing on the Akatsuki from ''Manga/{{Naruto}}'', clocks in at over 700,000 words, starting with ''[[http://www.fanfiction.net/s/6603075/1/Consider-Yourselves-Kitties Consider Yourselves Kitties]]''. This is notable because kitten fics have a tendency to [[OrphanedSeries peter out after the first few chapters]], even more so than most fics.

* ''Fanfic/HorseshoesAndHandGrenades'' and stories relating to it have a combined total of 327,195 words with most of them not even finished and most likely more stories on the horizon.
* The ''Webcomic/{{Homestuck}}'' fanfic ''Fanfic/LikeOneSunderedStar'' is 700,000 words long as of Chapter 17, not counting its 90,000+ word "intermission fic". WordOfGod says that the main story is not even at its halfway point and that there will be at least one more intermission.
* ''Fanfic/{{Family}}'' by The Middle Warner Sibling, an ''WesternAnimation/{{Animaniacs}}'' fanfiction following the lives of the Warner Siblings within an AnimatedActor universe, has a completed total of 763,370 words. However, if taking into account the side-story ''[[https://www.fanfiction.net/s/4638224/1/Friends Friends]]'', which contains some particularly imperative plot points in the context of ''Family'', the two add up a total of 966,373 words for the universe as a whole.
* ''Fanfic/TheMobiusChronicles'' is currently two-and-a-half books and over 1,000 pages long, and the author reckons he has "multiple books" left to go.
* The entire ''Fanfic/Gensokyo20XX'' series is about 343,453 words long, with one story in particular being about 120 chapters.
* As of March 28, 2023, ''Fanfic/PokemonResetBloodlines'' stands at 868,452 words. And that's just the main story; [[ExpandedUniverse the numerous spinoffs and tie-in one-shots set in the same continuity]] add up even more for a total of 1,963,707 words (according to the Platform/ArchiveOfOurOwn stats), and over 6002 pages according to the ''[[https://www.royalroad.com/ Royal Road]]'' stats.
* ''Fanfic/CitadelOfTheHeart'' as of writing in December 21st, 2019 adds up to 506,685 words as an entire SeriesFic, but only ''Truth and Ideals'' among the individual fics is completed as of writing. ''Truth and Ideals'' proper consists of 80 Chapters, a shorter prologue and epilogue page, and consists of 254,053 words; the other installments so far have currently less than [=100K=] words, with the second highest being ''Sword Art Online: Special Edition'' at 77,912 words. Current statistics for word counts among other things can be checked [[https://archiveofourown.org/series/366716 here]], but be warned as some of the stories are NSFW. The word count appears differently on Fanfiction.net, because formatting purposes do not prevent author's notes from being excluded from the word counts. [=AO3=] has a feature that allows you to place author's note at the start and or end of any chapter by toggling the option to do so, and they'll be able to be automatically excluded from the word count for the story as a whole because of this.

* As of August 2022, ''Fanfic/RitesOfAscension'' is over 600K words long- and WordOfGod is that it is currently through the second of five projected books. Furthermore there are a few stories also set in the same universe.
* ''Fanfic/SeasonsOfChange'' is over 320,000 words as of December 2022.
* ''Fanfic/TheBridge'', a crossover between ''Franchise/{{Godzilla}}'' and ''WesternAnimation/MyLittlePonyFriendshipIsMagic'', is over 1.2 million words as of August 2023. Furthermore there are also a few sidestories and spinoffs to it.
[[/folder]]
----

* SunsetsIsekai: : The current word count as of March 2nd, 2024, is 451,671. This is across 107 chapters, the longest of which, which happens to be the hundredth, is 12,297 words. With no end to the story in sight, the 500,000 word mark is not far away.

* As of November 2023, ''[[Fanfic/FutureShockCameron Future Shock - Cameron]]'' ([[https://archiveofourown.org/works/15287826 link]]), a ''Series/TerminatorTheSarahConnorChronicles'' fanfic, clocks in at 7,764,835 words spread out over 1,585 chapters. It is the longest fanfic hosted on Archive of Our Own.

* ''Fanfic/TheLoudHouseRevamped'', a ''WesternAnimation/TheLoudHouse'' MassiveMultiplayerCrossover fanfic, dethroned ''Fanfic/AmbienceAFleetSymphony'' to become not just Website/FanFictionDotNet's longest ongoing fanfiction, but the site's longest fanfic ever and the longest piece of literature ''in recorded history''. It was finished in February of 2024, sitting at over 34.8 million words across 2,328 chapters. It's actually so long that ''it broke Fanfiction.net's word count''; meaning that other methods are needed to count words, as the site can't display anything higher than 16,777,215 (the site uses 24-bit integers). For the curious: it's a self-insert fanfic wherein the protagonist joins with the Loud House to combat evil forces. Most of the text, however, is in script format and consists of one-liners and [[UsefulNotes/{{Plagiarism}} copy-pasted fan wiki entries]].

* On 17th June 2017, ''Fanfic/AmbienceAFleetSymphony'' reached 4,061,145 words, replacing ''Fanfic/TheSubspaceEmissarysWorldsConquest'' as Website/FanFictionDotNet's longest ongoing fanfiction, and as of 24th January 2020, it is sitting at an even longer 4,102,328 words long. Having been first published on 8th May 2014, it was at one point the fastest-growing fanfiction on the site, with the author consistently putting out chapters near or exceeding 10,000 words every other day between the start of 2016 and mid-2017.
* ''Fanfic/{{Death|Tmb1112}}'', a ''Manga/MyHeroAcademia'' fanfiction, has 4,479,292 words across 259 chapters. This makes it the third longest fanfiction on Website/FanFictionDotNet. The story grew to over 1,000,000 words within its first four months. Many of the chapters published in 2020-2021 exceeded 40,000 words each, with Chapter 233 being a whopping 152,877 words.
* ''Fanfic/TheSubspaceEmissarysWorldsConquest'' was for many years the longest (non-troll) fanfiction on the Website/FanFictionDotNet site, and as of 12 June 2018 contains 221 chapters consisting of ''4,102,328'' words. And it's not even finished - the author has been updating this fic since March of 2008, and is hoping to make it 400 chapters. The most recent chapters are roughly 40,000 words each. That's enough for them to qualify as novels on their own, at least according to The Science Fiction and Fantasy Writers of America's criteria.

* ''Fanfic/CCWCharacterChampionshipWrestling'' ([[https://archiveofourown.org/works/992851/chapters/1961979 link]]) is the longest GenFic on Website/ArchiveOfOurOwn. As of its last update on 4 December 2017 it is 229 chapters and 3,817,471 words long.

* ''Fanfic/FreakinGensokyo'' is a ''Franchise/TouhouProject'' fanfic, which, as of March 2023, has 165 chapters consisting of ''2,668,064'' words. It's way more than the author expected, as he wanted to end the fanfic at either 1,000,000 words mark or 100 chapters. It is the longest Franchise/TouhouProject fanfic on Website/FanFictionDotNet.

* [[https://archiveofourown.org/series/2840566 The Kismet Trilogy]] has only had two of the three works completed, and is already at over 3.7 million words. ''A Second Chance'' alone is the longest ''Harry Potter'' fic hosted on Website/ArchiveOfOurOwn!

* ''Fanfic/ImperfectMetamorphosis'' is a Franchise/TouhouProject dark fic, which, as of March 2022, has ''1,327,344'' words. It is the second longest Franchise/TouhouProject fanfic on Website/FanFictionDotNet, as well as one of the most well known fanfics in the Franchise/TouhouProject's western community.

* At over 1,101,000 and still ongoing as of 2018 ''Fanfic/{{Drifting}}'' is currently the second longest ''Manga/{{Naruto}}'' story on Website/FanFictionDotNet.

* ''Fanfic/UniverseFalls'', as noted by the creator, is the longest ''WesternAnimation/GravityFalls'' fanfic and the longest ''WesternAnimation/StevenUniverse'' fanfic on Website/FanFictionDotNet, with 1,701,585 words (as of October 2020), and were at the beginning of Arc 9.

* While the ''Fanfic/BloomingMoonChronicles'' are a doorstopper as a whole, two stories from the series deserve special mention: ''Glory Be'', with 1,039,124 words, and ''Hecate's Orphanage'', with 1,149,615. (It should be noted that these wordcounts are taken from the version published on Website/FimfictionDotNet. The fanfiction.net publications have a few thousand words extra.)

* ''Fanfic/ExercisesInGratitudeTheBarclayStreetFlood'' is the longest ''Franchise/{{Splatoon}}'' fanfic on Website/ArchiveOfOurOwn, at well over 600,000 words and a chapter count in the triple digits.

* The longest ''WesternAnimation/MiraculousLadybug'' fics on Website/ArchiveOfOurOwn are:

* At over 620k words, ''Fanfic/SpellboundLilafly'' is the second-longest ''WesternAnimation/MiraculousLadybug'' fanfic on Website/ArchiveOfOurOwn as of October 2023.

* As of November 2023, the ongoing ''VideoGame/MegaManZero'' and ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' fanfic ''Fanfic/ManehattansLoneGuardian'' totals 276,000 words over 60 chapters, and is the longest ''Franchise/MegaMan'' crossover on Website/FimfictionDotNet.

* ''Fanfic/PowersOfInvisibility'' is the second longest completed ''WesternAnimation/MiraculousLadybug'' story on Website/ArchiveOfOurOwn at 246,310 words and it's currently in fourth place overall. A sequel and some one-shot followups have been announced.

* As of March 28, 2023, ''Fanfic/PokemonResetBloodlines'' stands at 868,452 words. And that's just the main story; [[ExpandedUniverse the numerous spinoffs and tie-in oneshots set in the same continuity]] add up even more for a total of 1,963,707 words (according to the ''Website/ArchiveOfOurOwn'' stats), and over 6002 pages according to the ''[[https://www.royalroad.com/ Royal Road]]'' stats.

* ''Fanfic/TheLoudHouseRevamped'', a ''WesternAnimation/TheLoudHouse'' MassiveMultiplayerCrossover fanfic, dethroned ''Fanfic/AmbienceAFleetSymphony'' to become not just Website/FanFictionDotNet's longest ongoing fanfiction, but the site's longest fanfic ever and the longest piece of literature ''in recorded history''. As of December 2023, it sits at over 31.5 million words across 2,277 chapters. It's actually so long that ''it broke Fanfiction.net's word count''; meaning that other methods are needed to count words, as the site can't display anything higher than 16,777,215 (the site uses 24-bit integers). For the curious: it's a self-insert fanfic wherein the protagonist joins with the Loud House to combat evil forces. Most of the text, however, is in script format and consists of one-liners and [[UsefulNotes/{{Plagiarism}} copy-pasted fan wiki entries]].

* ''Fanfic/AColdCalculus'' is a Euphemia-themed ''Code Geass'' ForWantOfANail fic with 1304k+ words.

* ''[[https://archiveofourown.org/series/2512603 life in the margins of redemption]]'' is a ForWantOfANail ''WebVideo/CriticalRole'' series that has Cree preventing Molly's death on the Glory Run Road and changing the course of Campaign Two. At 615,134 words, the first fic in the series had the distinction of being the longest ''WebVideo/CriticalRole'' fic hosted on Archive of Our Own as of December 2022 with the second part rapidly overtaking it a year later, putting the total word count at 1.2 million.

* The ''Fanfic/ForTheWantOfANail'' series is a series of ''Manga/MyHeroAcademia'' fanfics, with the [[ForWantOfANail titular nail]] being Izuku never receiving One For All, thus remaining [[UnSorcerer Quirkless]]. As of December 1st, 2021, the series clocks in at 744,837 words.

* As of chapter 30, the ''VideoGame/Persona5'' ForWantOfANail Fanfic ''Fanfic/WingsOfRebellion'' is at 302,212 words long.

* As of March 2023, the ''VideoGame/{{Psychonauts}}'' ForWantOfANail fanfic ''Fanfic/LaterTraitor'' clocks in at 191,621 words spread out over 40 chapters.

* "[[https://archiveofourown.org/works/49698409 Broken Balance]]" is a WebAnimation/{{Murder Drones}} fanfic. As of 7th of January 2024 it is over 522,830 words and 83 chapters long, making it the longest Murder Drones fanfic on the site with a word count over two times higher that the next longest fanfic of the series. It is also still ongoing.