[-[[caption-width-right:350:If you are a [[SuperVillain villain]], [[OhCrap you are probably crapping your pants right now.]]]]-]

->''"The League leads. When there is a Crisis, the other heroes -- and the world -- look to us first to deal with it, to rally others. We set the example."''
-->-- '''''ComicBook/MartianManhunter'''''

'''''[[TropeCodifier The]]''''' SuperTeam.

Composed (usually) of the heavy hitters of Franchise/TheDCU, the Justice League has been around in one form or another since UsefulNotes/TheSilverAgeOfComicBooks, and doesn't show any sign of going away. The team debuted in ''ComicBook/TheBraveAndTheBold'' #28 (February-March, 1960), created by writer Gardner Fox and artist Mike Sekowsky. Their appearances in three consecutive issues of ''The Brave and the Bold'' served as a trial run. The concept sold well and the team graduated to its first eponymous title by October, 1960.

The original lineup is Franchise/{{Superman}}, Franchise/{{Batman}}, Franchise/WonderWoman, Franchise/GreenLantern, Franchise/TheFlash, Comicbook/{{Aquaman}}, and the ComicBook/MartianManhunter (commonly known as the "Magnificent Seven" or just the "big seven", and considered the greatest heroes on Earth by pretty much the entire superhero community). Which almost immediately (6 issues later) started to gradually expand to include ComicBook/GreenArrow, ComicBook/TheAtom, ComicBook/{{Hawkman}}, ComicBook/BlackCanary, ComicBook/ThePhantomStranger, ComicBook/ElongatedMan, ComicBook/RedTornado, [[ComicBook/{{Hawkman}} Hawkgirl]], ComicBook/{{Zatanna}} and, finally, ComicBook/{{Firestorm}}. After that, the group has repeatedly disassembled and reassembled, sometimes with drastic membership changes, including a revival of the original seven. Basically, every Creator/DCComics superhero who didn't belong to another team (and a few who did) was a member at one time or another ([[ComicBook/JLAAvengers and even an entire team of non-DC superheroes!]]). And as the premier group of heroes in the DCU, when a cosmic crisis threatens, ''every superhero available'' becomes a temporary member of the JLA, such is the importance of the group.

After Creator/MarkWaid and Creator/GrantMorrison's revival, the originals are considered the "Big Seven", and cover the archetypes any superhero team should possess (classical superhero, dark vigilante, fantasy/mythological being, speedster, elemental hero, cosmic hero, psychic).

Originally, they were the local crime-fighting club, composed of the best of the best. They were effectively a "social club" for superheroes, where they could hang out with similar people (when not fighting evil). There was no set leader, though certain heroes (such as Superman, Batman or the Martian Manhunter) often ended up taking leadership roles due to their popularity and skill. New members were chosen by voting, which might explain why several heroes that felt rather redundant were added to the roster. They had a series of [[SupervillainLair special bases over the years,]] most notably a satellite headquarters in orbit above the Earth.

In the 80's, DC's editorial team noticed that they were being outsold by the Franchise/TeenTitans and the ComicBook/XMen, more action-oriented, character-driven teams. So, [[ReTool suddenly]], Aquaman gave a big speech about how the team couldn't depend on heroes who were too busy to show up all the time, and reformed the team with a bunch of second-stringers and a few new characters. They operated out of a warehouse in Detroit (for which they got the FanNickname "Justice League Detroit"). For this reason they were a little ineffectual during ''ComicBook/CrisisOnInfiniteEarths''.

As a result of this, the team was retooled again in the '80s, becoming Justice League International (taking over the [[MultinationalTeam Global Guardians']] role, and adding in some of the latter group's members) which then split into Justice League America and Justice League Europe, which later (after their membership grew huge) further split into the Justice League Task Force (a "superhero school" led by the Martian Manhunter), and [[DorkAge Extreme Justice]], which was led by the more proactive Captain Atom.

This approach fizzled after a few years, so DC took the team back to basics by reuniting the original Big Seven and giving them a lunar Watchtower base. The series was relaunched as ''JLA'' by ComicBook/GrantMorrison, who emphasized the team's role as the "gods" of the DCU, and had them only go up against the sort of tremendous, cosmic-level threats which befitted that stature. This new approach was such a hit that for several years pretty much all major events in the DCU revolved around the League, and countless miniseries and one-shots were spun off the new title. After Morrison left, succeeding writers (most notably Mark Waid) continued his approach.

The team has a long tradition of [[{{Crossover}} Crossovers]] with the ComicBook/JusticeSocietyOfAmerica. Once labelled "Crisis on (Something)" fairly often; commonly takes place at a get-together (or at a [[AnAssKickingChristmas Christmas/Thanksgiving]] dinner post-Crisis) attended by both teams, when suddenly a villain attacks. This stopped happening regularly around 1986 with ''Crisis on Infinite Earths'', though the tradition has popped up sporadically since then (1998's "Crisis Times Five", 2002's ''JSA/JLA: Virtue and Vice'', 2007's "The Lightning Saga").

An animated television adaptation called ''WesternAnimation/JusticeLeague'' aired from 2001 to 2006 on Creator/CartoonNetwork and was produced by [[Creator/WarnerBros Warner Bros. Animation]]. The series is set in the ''Franchise/DCAnimatedUniverse'' and based on the Justice League of America along with the associated comic book characters published by DC Comics. After the second season, the series' title was changed to ''WesternAnimation/JusticeLeagueUnlimited''.

A film adaptation set in the Franchise/DCExtendedUniverse was released in 2017.

!!Media adaptations where the Justice League appears:

[[AC:Animated Film]]
* ''WesternAnimation/JusticeLeagueTheNewFrontier''
* ''WesternAnimation/JusticeLeagueCrisisOnTwoEarths''
* ''WesternAnimation/JusticeLeagueDoom''
* ''WesternAnimation/JusticeLeagueTheFlashpointParadox''
* ''WesternAnimation/JusticeLeagueWar''
* ''WesternAnimation/JLAAdventuresTrappedInTime''

* The Franchise/DCExtendedUniverse:
** ''Film/BatmanVSupermanDawnOfJustice'' - As the name suggests, the movie sets up the origins of the League, with focus on the Trinity (Batman, Superman and Wonder Woman) and cameos of future members via the footage Bruce Wayne steals from Lex Luthor.
** ''Film/{{Suicide Squad|2016}}'' - Amanda Waller gives some files about the Flash and Aquaman to Bruce Wayne so he can find them.
** ''Film/{{Justice League|2017}}'' - The very first movie gathering of the team to face the threat of an Apokoliptian invasion of the Earth by Steppenwolf and hordes of Parademons.

[[AC:Live Action TV]]
* ''Film/JusticeLeagueOfAmerica'' (A TV PilotMovie)

[[AC:Video Games]]
* ''VideoGame/JusticeLeagueTaskForce''
* ''VideoGame/JusticeLeagueHeroes''
** ''VideoGame/JusticeLeagueHeroesTheFlash''
* ''VideoGame/DCUniverseOnline''
* ''VideoGame/MortalKombatVsDCUniverse''
* ''VideoGame/InjusticeGodsAmongUs''

* ''WesternAnimation/{{Superfriends}}''
* ''Franchise/DCAnimatedUniverse''
** ''WesternAnimation/JusticeLeague'' (and its SequelSeries, ''Justice League Unlimited'')
** ''WesternAnimation/BatmanBeyond'' (a futuristic version of the league appears)
* ''WesternAnimation/YoungJustice'' (while the focus is on the sidekicks, the League has a presence in the story)
* ''WesternAnimation/JusticeLeagueAction''
!!Here are the different incarnations of the Justice League of America so far:

* '''The Original Big Seven''' (Gardner Fox/Mike Sekowsky): Franchise/{{Superman}}, Franchise/{{Batman}}, Franchise/WonderWoman, Franchise/TheFlash II (Barry Allen), Franchise/GreenLantern II (Hal Jordan), Comicbook/{{Aquaman}} & ComicBook/MartianManhunter, based inside a hollow mountain, the "Secret Sanctuary." Later members included ComicBook/GreenArrow, ComicBook/TheAtom II (Ray Palmer), ComicBook/BlackCanary II and ComicBook/{{Hawkman}}. Snapper Carr served as the team mascot, or as an honorary member, depending on who you ask.
** '''The [[ComicBook/PostCrisis Post-Crisis]]/Year One League''' (Mark Waid): Like most things in the DCU, this was retconned after ''ComicBook/CrisisOnInfiniteEarths''. In this version of the team's history, Superman, Batman and Wonder Woman were no longer founding members of the League, but Black Canary II was. ([[InSpiteOfANail Though it turned out that Superman and Batman later joined anyway, leaving Wonder Woman as the only true missing link.]]) Following the events of ''ComicBook/InfiniteCrisis'', Superman, Batman, and Wonder Woman were restored as founding members; it's not entirely clear whether Black Canary remains as an eighth founder, or joined later as she did in the original continuity.
* '''The Satellite-Era League''' (Dennis O'Neil, Mike Friedrich, Len Wein, Gerry Conway, Steve Englehart): Basically everyone mentioned above plus ComicBook/ElongatedMan, Hawkgirl I, ComicBook/{{Firestorm}} I (Ronnie Raymond/Martin Stein), ComicBook/RedTornado II, and ComicBook/{{Zatanna}}. Also Elongated Man's wife, Sue Dibny, sort of. The Martian Manhunter was absent for most of this era when it was originally printed, but seems to have been [[RetCon retconned]] back in. Also had stretches where Green Arrow and/or Batman had quit the team, but overall, the lineup was quite stable by today's standards. There were several honorary members of whom only one - ComicBook/{{the Phantom Stranger}} - actively participated in their cases on a semi-regular basis.
* '''Justice League Detroit''' (Gerry Conway): Four established [=JLAers=] (Aquaman, Martian Manhunter, Elongated Man, and Zatanna), one previously-obscure character (Comicbook/{{Vixen}}), and three complete newcomers (ComicBook/{{Vibe}}, Gypsy, and Steel II - a LegacyCharacter of Commander Steel, not to be confused with [[ComicBook/{{Steel}} John Henry Irons]]). Later on, Aquaman quit and Batman rejoined. Has its fans, but widely considered a DorkAge.
* '''Justice League[=/=]ComicBook/JusticeLeagueInternational/Justice League America''' (Keith Giffen/J.M. [=DeMatteis=]): Created after the events of the ''[[ComicBook/LegendsDC Legends]]'' CrisisCrossover. Officially, started with a (probably editorially mandated) lineup of Batman, Martian Manhunter, Green Lantern IV (Guy Gardner), Black Canary II, [[ComicBook/{{Shazam}} Captain Marvel]], Dr. Light III (Kimiyo Hoshi), ComicBook/BlueBeetle II (Ted Kord), [[ComicBook/NewGods Mr. Miracle]] (with his 'manager', Oberon), and ComicBook/DoctorFate II, a lineup that showed off the possibilities of the new continuity by featuring characters previously from four different Earths. The writers had different ideas; Doctor Light never actually joined (until much later), Doctor Fate and Captain Marvel were gone within six issues, and the stories soon took on a generally humorous tone that did not, at first, sit well with some fans. ComicBook/BoosterGold, ComicBook/CaptainAtom, Rocket Red #7 (Vladimir Mikoyan), Fire, and Ice were among the first of [[LoadsAndLoadsOfCharacters many]] to join as those same elements of humor quickly made the series a fan favorite. After the events of ''Invasion!'', as well as the opening of Justice League Europe (see below), JLI was renamed "Justice League America" (no "of"). After Giffen and [=DeMatteis=] left the series following the "Breakdowns" arc, the series struggled along as writers such as Dan Jurgens, Dan Vado, and Gerard Jones tried to keep the book and its spin-offs afloat with little success.
** '''Justice League Europe''' (Keith Giffen/J.M. [=DeMatteis=]): The Flash III (Wally West), Captain Atom, Rocket Red #4 (Dmitri Pushkin), ComicBook/PowerGirl, Elongated Man, and ComicBook/{{Metamorpho}} (and Wonder Woman, who left after the first mission). Created after the ''ComicBook/{{Invasion}}'' crossover. Subsequently joined by Crimson Fox, Green Lantern II (Hal Jordan), Dr. Light III (Kimiyo Hoshi) and Aquaman. Later renamed ''Justice League International'', just to be confusing.
** '''Justice League Task Force''' (David Michelinie/Sal Velluto): Originally a rotating membership of whoever would be needed for a given mission. After ''ComicBook/ZeroHour'', reinvented as the League "school" with the Martian Manhunter, ComicBook/TheRay II (Ray Terrill), Triumph, Gypsy, and L-Ron in the body of Despero.
** The Justice League International was reformed in the 2010 bi-weekly series [[ComicBook/JusticeLeagueGenerationLost Justice League: Generation Lost]] in order to track down Max Lord. This version of the team featured Booster Gold (as team leader), Captain Atom, Fire, Ice, Blue Beetle III (Jaime Reyes), and a brand new Rocket Red (Gavril Ivanovich).
* '''The Post-ComicBook/ZeroHour League''' (Gerard Jones): Wonder Woman, the Flash III (Wally West), Hawkman III (Katar Hol ... [[ContinuitySnarl sort of]]), Fire, Icemaiden (Sigrid Nansen), Nuklon, Obsidian, ComicBook/BlueDevil. The most radical reinvention of the Giffen/[=DeMatteis=] League, ComicBook/ZeroHour had all the teams disbanded, and Wonder Woman reinvent the League as a "superhero club", with an official membership of "anyone who's interested". Captain Atom decided the ''real'' Justice League ought to be better organized, but should have been careful what he wished for, because the result was...
** '''Extreme Justice''' (Dan Vado/Marc Campos): Captain Atom, Firestorm (Ronnie Raymond), Booster Gold, Blue Beetle II, Amazing Man II, Maxima. As if the "Extreme" in the name wasn't clue enough, this series was a massive DorkAge, with art and page layouts that severely aped the worst of Creator/RobLiefeld and Jim Lee's tendencies (overly muscular, unexpressive characters and "flip the comic sideways" pages) with a heavy emphasis on action over character dynamics.
* '''JLA''' (Grant Morrison/Howard Porter/Mark Waid/Joe Kelly/Doug Mahnke): Superman, Batman, Wonder Woman, the Flash III (Wally West), Green Lantern V (Kyle Rayner), Aquaman, Martian Manhunter. In other words, the original seven (or rather, five of them and the then-current successors of the other two). Based on the Moon. Later included ComicBook/{{Steel}} III, ComicBook/PlasticMan, [[ComicBook/BirdsOfPrey Oracle]], [[ComicBook/NewGods Big Barda, Orion,]] Zauriel, ComicBook/{{Huntress}}, and, temporarily, Wonder Woman's mother Hippolyta instead of Diana. Main focus was the core seven (occasionally plus Plastic Man), though. Largely had to do with the idea that because the JLA is so powerful, they should be fighting harder villains than just super-terrorists. Very fondly remembered, even by those who hate everything else Creator/GrantMorrison has ever done.
* '''The Post-ComicBook/InfiniteCrisis League''' (Brad Meltzer/Ed Benes[=/=]Creator/DwayneMcDuffie): Varied but seemed similar to the Satellite version, except they were now based in the [[WesternAnimation/{{Superfriends}} Hall of Justice]]. Started out with Superman, Batman, Wonder Woman, Green Lantern II/III (either Hal or John Stewart), Vixen, Black Canary II, Red Tornado II, Comicbook/BlackLightning, Red Arrow, and Hawkgirl (Kendra Saunders); Geo-Force was often pictured as part of this lineup, but he never actually joined, he just played a minor part in their first story arc.
* '''The Post-ComicBook/FinalCrisis League''' (James Robinson/Mark Bagley): Spinning out of Robinson's ''ComicBook/JusticeLeagueCryForJustice'' miniseries, the new team comprised Green Lantern II (Hal Jordan), the Atom II (Ray Palmer), Batman III ([[ComicBook/GrantMorrisonsBatman Dick Grayson]]), Mon-El, [[ComicBook/WonderGirl Donna Troy]], Comicbook/{{Cyborg}}, Doctor Light III, ComicBook/{{Starfire}}, Congorilla, and the Guardian. Green Arrow, the main character in ''Cry For Justice'', was a member for the first few issues, until certain events in ''Cry For Justice'' caught up with him.
* '''The Post-ComicBook/BlackestNight League''' (James Robinson/Mark Bagley): Robinson wasn't satisfied with the way his JLA was going; among other things he thought he had tried to put in too many characters. He reshuffled the roster and settled on Batman III (Dick Grayson), ComicBook/{{Supergirl}}, Donna Troy, Jade, Comicbook/{{Starman}} (Mikaal Thomas), Congorilla and Jesse Quick, thus making a somewhat rough second generation equivalent to the original team lineup.
* '''The ComicBook/{{New 52}} League''': This team was written by Creator/GeoffJohns and featured the Big Seven, only with Cyborg replacing Martian Manhunter (who was in ''ComicBook/{{Stormwatch}}'' instead); in addition to these seven, the team was later bolstered by Firestorm (Ronnie Raymond/Jason Rusch), Element Woman, and a new version of the Atom (Rhonda Pineda). ComicBook/LexLuthor, Shazam, and Captain Cold joined the team after ComicBook/ForeverEvil.
** In addition, there was a new, separate ComicBook/JusticeLeagueInternational, written by Dan Jurgens, with Booster Gold as the team leader, Batman (Bruce Wayne), Green Lantern III (Guy Gardner), Fire, Ice, Vixen, Rocket Red, Godiva, and August General In Iron (a Chinese hero introduced in ''ComicBook/FiftyTwo''). Batwing, Blue Beetle III (Jaime Reyes) and the Olympian all joined over the course of the series.
** There was also the ComicBook/JusticeLeagueDark, written by Peter Milligan, a team of supernatural heroes featuring ComicBook/JohnConstantine, Deadman, ComicBook/MadameXanadu, Zatanna, and ComicBook/ShadeTheChangingMan.
** With the cancellation of Justice League International, a [[ComicBook/JusticeLeagueOfAmerica2013 new Justice League of America book]] was released in February 2013 by Geoff Johns and David Finch with an unexpected roster of Steve Trevor, Martian Manhunter, Hawkman, the new Green Lantern (Simon Baz), Stargirl, Comicbook/{{Catwoman}}, Vibe, Green Arrow and ComicBook/{{Katana}}.
** Justice League of America then got replaced by Jeff Lemire's Justice League United, with Green Arrow, Stargirl, Martian Manhunter and Hawkman continuing from the previous title, with the addition of Comicbook/AnimalMan, [[Comicbook/AdamStrange Adam and Alanna Strange]], and Comicbook/{{Supergirl}}.
* '''The ComicBook/DCRebirth League''' (Bryan Hitch/[[Creator/ChristopherPriestComics Christopher Priest]]): Once again featuring the New 52 Big Seven; however, the ''New 52'' Superman was replaced by his pre-''ComicBook/{{Flashpoint}}'' counterpart while Hal Jordan was replaced by dual Earth Green Lanterns Jessica Cruz and Simon Baz. After ''ComicBook/SupermanReborn'' resolved Superman's situation, the ''Rebirth'' Superman returned to the League.
** Spinning out of the events of ''ComicBook/JusticeLeagueVsSuicideSquad'' was ''ComicBook/JusticeLeagueOfAmericaRebirth'', written by Steve Orlando. This team was formed by Batman (though he maintained membership in the core Justice League) and consisted of the aforementioned Batman, ComicBook/{{the Atom}} (Ryan Choi), ComicBook/{{Vixen}}, ComicBook/{{the Ray}} (Ray Terrill), Killer Frost (Caitlin Snow), SelfDemonstrating/{{Lobo}} and ComicBook/BlackCanary (Dinah Lance), operating from the Secret Sanctuary.
** In Gene Luen Yang's ''ComicBook/NewSuperMan'', China formed its own League, the Justice League of China, comprised of the New Super-Man (Kenan Kong), Bat-Man (Baixi Wang), Wonder-Woman (Deilan Peng) and the Flash (Avery Ho), who eventually decided to go independent of the Chinese government. As a result, the series [[NewSeasonNewName changed title]] to ''New Super-Man and the Justice League of China''.
** The 2018 ''ComicBook/JusticeLeagueNoJustice'' mini-series sees the Justice League split and expand into four new teams to handle a devastating threat from space, as a prelude to the post-''ComicBook/DarkNightsMetal'' Leagues. Formed by Brainiac, these teams are:
*** Team Mystery -- Superman, Starfire, Sinestro, Martian Manhunter, Starro
*** Team Entropy -- Batman, Lobo, Lex Luthor, ComicBook/{{Deathstroke}}, Beast Boy
*** Team Wonder -- Wonder Woman, ComicBook/{{Raven}}, Zatanna, Dr. Fate, ComicBook/{{Etrigan}} the Demon
*** Team Wisdom -- Flash (Barry Allen), Atom (Ryan Choi), Robin (Damian Wayne), Cyborg, Harley Quinn
* '''The "New Justice" League''' - Spinning out of ''No Justice'' are three new Leagues, all operating out of the Hall of Justice:
** '''Justice League''' (Creator/ScottSnyder[=/=]Jorge Jiminez): The most iconic League rosters are combined to create a legendary line-up, comprised of Superman, Batman, Wonder Woman, Flash (Barry Allen), Martian Manhunter, Green Lantern (John Stewart), Aquaman, Cyborg, and Hawkwoman (Kendra Saunders).
** '''ComicBook/JusticeLeagueDark''' (James Tynion IV): The supernatural branch is reopened with Wonder Woman leading a team comprised of John Constantine, Dr. Fate, Detective Chimp, ComicBook/SwampThing, Zatanna and Man-Bat.
** '''Justice League Odyssey''' (Josh Williamson/Stjepan Sejic): A new space-faring team lead by Cyborg comprised of Green Lantern (Jessica Cruz), Starfire, ComicBook/{{Azrael}} (Jean-Paul Valley) and... ''Darkseid''?!
** This era also sees a new incarnation of [[ComicBook/TeenTitans the Titans]] operating out of the Hall as well, serving partly as the League's "AAA farm team".

DC even has a FunnyAnimal counterpart of the Justice League: the "[[Comicbook/CaptainCarrotAndHisAmazingZooCrew Just'a Lotta Animals]]" of [[Franchise/TheDCU Earth-C-Minus]], a parallel Earth that's a funny-animal counterpart of the mainstream DCU. The core roster of the "JLA" consists of:
* Super-Squirrel (a squirrel, counterpart of Superman)
* The Batmouse (a mouse, counterpart of Batman)
* Wonder Wabbit (a rabbit, counterpart of Wonder Woman)
* Green Lambkin (a male sheep, counterpart of the Silver Age Green Lantern)
* The Crash (a turtle, counterpart of the Silver Age Flash)
* Aquaduck (a duck, counterpart of Aquaman)

Other members included: Hawkmoose; Green Sparrow; Stacked Canary; the Martian Anteater; the Item (the Atom; an elephant); Zap-Panda (Zatanna); and Elongator (the Elongated Man; an alligator).

!!This series contains examples of:

* AlternateCompanyEquivalent: Comicbook/TheAvengers
* AmericaIsStillAColony: In one issue of Creator/GrantMorrison's ''JLA'', a probability-altering villain twisted time so America never revolted, and a [[UsefulNotes/TheHouseOfHanover King George]] was on the throne. Amongst other things, the Capitol Building changes to look kind of like a larger version of the Houses of Parliament.
* AndNowForSomethingCompletelyDifferent: During ''Forever Evil'', the tie-in issues focus on Grid examining the past of the Crime Syndicate (Ultraman, Owlman, Johnny Quick, Atomica and Power Ring), and Cyborg meeting the Metal Men, while the Justice Leagues are missing.
* AnimalThemedSuperbeing: Franchise/{{Batman}} and Hawkman are the most prolific but we also have Hawkwoman, Comicbook/AnimalMan, ComicBook/{{Vixen}}, ComicBook/BlackCanary, and Red Robin.
** This is also prevalent in enemies they have fought: Black Manta, Gorilla Grodd, Starro, etc.
* ArtifactTitle: Partly. The Justice League of ''America'' tackles worldwide, universal, and even multiversal threats.
* AuthorTract: James Robinson's run is rife with his views on other characters, such as ComicBook/{{Vixen}} being referred to as a pathetic knock-off of ComicBook/AnimalMan. This culminates in the final issue before the ComicBook/{{New 52}} reboot where he has various League members tear into some of the stuff mentioned about the reboot, including Dick Grayson becoming Nightwing again and the no-show of Donna Troy.
* BadassCrew: THE most BadassCrew in the [[Franchise/TheDCU DC Universe]].
* BarBrawl: In ''Justice League United'' #5, four Leaguers -ComicBook/GreenArrow, ComicBook/{{Supergirl}}, Stargirl and Animal Man- barge in Block-C20, a derelict space station turned into a bar for bounty hunters who take exception to the presence of several Earth heroes. Chaos ensues.
* BarFullOfAliens: Block-C20 in ''Justice League United'' #5, a derelict space station turned into a bar for bounty hunters.
* {{Bookends}}: The Morrison era title was set up with a prequel miniseries featuring Doctor Destiny. Its AndTheAdventureContinues epilogue has the League racing off to face Doctor Destiny again.
* CheeseEatingSurrenderMonkeys: [[InvokedTrope Invoked]] by Guy Gardner's response to a French General's request for help in "Wonder Woman and Justice League America".
-->'''Guy:''' It sounds like you want us to do your job for you. It figures, you being French and all.
* ChuckCunninghamSyndrome: In Gardner Fox's stories, the Martian Manhunter was utilized as a stand-in for Superman due to Mort Weisinger insisting that the latter have limited use. After this limitation was appealed, Fox had gradually less use of J'onn. It didn't help that under Fox, J'onn's Martian powers were severely underutilized (only being used nine times throughout Fox's reign as ''JLA'' writer). J'onn was finally dropped from the series when his comic was cancelled.
* ContinuityReboot:
** The Justice League originally started out as a full continuity reboot of the ComicBook/JusticeSocietyOfAmerica. Editor Julius Schwartz changed the word "Society" into the word "League" because he thought the word "Society" sounded too much like a quiet club name. The original continuity of the Justice Society was shown to have taken place in an alternate universe which was given the name Earth-Two.
** After the reboot of the [[Franchise/TheDCU DC Universe]] in ComicBook/CrisisOnInfiniteEarths, the Justice League actually continued onwards with its then in-progress storylines albeit with considerable changes to the history of the team.
** ComicBook/{{New 52}} was a full reboot of the Justice League; the first Justice League arc after the reboot was a flashback to how the team was originally formed and the early adventures of the team.
* CovertGroup: A covert ops group with technology-based powers working for the U.S. government tries to eliminate the world's superhumans.
* CrossOver: [[ComicBook/JLAAvengers The crossover]] with Comicbook/TheAvengers is the most famous but the team has also crossed over with the ComicBook/XMen during ''All Access'', a sequel to ''Marvel Vs. DC''. They also had a crossover with the ComicBook/{{WildCATS}} before Wildstorm went to DC. A [[ComicBook/JusticeLeagueMightyMorphinPowerRangers 2017 crossover]] with Creator/BOOMStudios unites the team with the [[ComicBook/MightyMorphinPowerRangersBoomStudios Mighty Morphin' Power Rangers]].
** The aforementioned crossover with the Avengers resulted in ComicBook/{{Hawkeye}} becoming the first Marvel hero to become an honorary member of the Justice League after saving both teams alongside The Flash.
** The annual crossover with the ComicBook/JusticeSocietyOfAmerica from 1963 up until ComicBook/CrisisOnInfiniteEarths.
** James Robinson's run had a crossover with Society during ''Brightest Day''.
* CrossoverFinale: The original volume ended with a ''Legends'' crossover, the JLI era effectively ended with a BatFamilyCrossover called "Breakdowns," and the 1990s ''JLA'' era was basically written out with ''Comicbook/IdentityCrisis''. Big status quo changes tend to force a reboot of the JLA, really.
* DefectorFromParadise: We have the League Member and veritable Angel of the Lord, Zauriel. He left Heaven because he fell in love with a mortal woman when acting as her guardian angel. [[SubvertedTrope It's a bit of subversion]] considering that Zauriel was actually kicked out of Heaven after expressing his desire to leave to his superiors, the King-Angels. After he was allowed permission to live in Heaven as he did before, he adamantly decided to live on Earth instead.
* DemotedToExtra: In the early adventures, Superman and Batman had limited roles due to Mort Weisinger and Jack Schiff, the editors of their respective comics at the time, not wanting to risk overexposure of the characters. In early 1962, when circulation of the ''JLA'' comic was beginning to die down, ''JLA'' editor Julius Schwartz and DC publisher Jack Liebowitz agreed that they need to give both characters more involving roles, on the basis that they belonged to DC Comics and ''not'' Weisinger and Schiff.
* DependingOnTheWriter: A cross-title one, with Batman in the ''New 52'' run. Geoff Johns has him angrily tell Steve Trevor that the concurrently running Justice League International is a joke, and tells him either he shuts them down or Bats will... as opposed to his portrayal in ''JLI'' itself, where Bats has no opposition to the team.
* DorkAge:
** Invoked in-universe. During Morrison's run, Triumph's return is loaded with characters mocking him for his duration on the team, citing that it was loaded with "losers and also-rans" and the villains they fought were just terrorists and space maniacs. Triumph spends most of his time saying it's not fair that the current League got the glory, the better headquarters, and the better villains.
** Likewise, when Robinson's tenure on the League ended before the reboot, he made a dig against everyone who believed his run to be a DorkAge.
* EvilCounterpart: The Crime Syndicate (or Society) of America, though most iterations of them tend to just consist of counterparts of the Big Seven.
* ExactWords: In "For Sale -- the Justice League!" (Vol. 1 No. 8), villain of the issue Pete Ricketts has the league under his control, and forbids them to use their own emergency signals in case Superman and Batman come back from their own mission. He didn't say not to use ''each other's'' signals, though.
* {{Flanderization}}: The Justice League in general occasionally suffers this problem. The heroes in their own books have multi-faceted personalities, while Justice League in the hands of sloppy writers reduces them to their most stereotypical natures, such as Batman being completely unfeeling and methodical, or Franchise/{{Superman}}'s "boy scout" persona. This is in part because each character was originally TheHero in their own titles. They weren't developed with a group dynamic in mind so some of their key character development has also come from them playing off of each other in the team books.
* {{Foreshadowing}}:
** Virtually the entire Morrison run, as well as the prequel miniseries ''Midsummer's Nightmare,'' sets up the final arc's plot point that [[spoiler: the League gives all of humanity superpowers to stop Mageddon.]]
** In the ''New 52'' origin story, Superman is abducted by Parademons and taken to Apokolips, where Desaad mentions Darkseid is also looking for his daughter, a plot point that wouldn't become relevant for several more years.
* GiganticMoon: The larger moon is justified in one story arc of Justice League; TheHeroes pull the moon into Earth's atmosphere as a mechanism to defeat an AlienInvasion.
* GiverOfLameNames: According to the ''New 52'' run, the team just narrowly avoided Barry Allen's first choice of name, the Super Seven.
* GreaterScopeVillain: Since the New 52 (and, in-universe, even before) a few beings qualify.
** Darkseid, the first villain the Justice League faced, has been conquering the multiverse, and is responsible for the invasion [[spoiler: and subsequent destruction]] of Earth-2.
** [[spoiler: [[ComicBook/CrisisOnInfiniteEarths The Anti-Monitor]]]], an even more dangerous being, who made the Crime Syndicate flee to escape their world (Earth-3) after he destroyed it. [[spoiler: He is going to kill Darkseid and is in league with his daughter]].
** [[spoiler: Brainiac]], easily number #3 on this list, his true form is a giant artificial entity, capturing cities from different timelines and universes before their destruction. Vril Dox's Brainiac is just one of his pawns.
** [[spoiler:The Empty Hand]], a sinister entity that led the Gentry to the invasion of the Multiverse, while it [[spoiler:works on a way to destroy all existence forever]]. Probably qualifies as the villain with the greatest scope.
* ImCryingButIDontKnowWhy: In the Morrison run, after their attempt to conquer Earth fails when they are [[WeaksauceWeakness found vulnerable to fire]], the [[ShapeShifting fifty White Martians]] face the [[PsychicPowers Martian]] [[MindManipulation Manhunter]]. At the end, the narrator tells us of a man that, every morning just after awakening, feels like he once had incredible power that is forever lost. [[HeelFaceBrainwashing This feeling of loss and frustration is shared by fifty other humans scattered across the Earth]], and is so big, he wants to cry. [[DefiedTrope But he doesn't, because he is an adult and has no time for such nonsense]]. So he smiles, goes out and [[LaserGuidedKarma begins his working day as a fireman]].
* KavorkaMan: Dale Gunn, a bald, middle-aged, unpowered mechanic who [[http://absorbascon.blogspot.com/2006/01/real-world-detroit-starring-dale-gunn.html inexplicably]] had both Zatanna and Vixen after him in the Detroit era.
* LoadsAndLoadsOfCharacters: It would be more difficult to name DC superheroes who weren't members of one version of the Justice League or another.
* MisplacedRetribution: The second arc of Geoff Johns' New 52 run has the League being attacked by a man named Graves, who blames them for a horrific disease he and his family caught during Darkseid's invasion, which killed them.
* NoodleIncident: The ''New 52'' run mentions that the Martian Manhunter did join the team at some point in their early years, but for whatever reason attacked them, wiped their minds and left, because... because, apparently.
* NoOneCouldSurviveThat: A rather clever example in Grant Morrison's run; Batman's plane is shot down and the villains decide not to check the burning wreckage because he must surely be dead. [[spoiler:This is the first clue to Batman--and clever readers--that they're White Martians, who are [[WeaksauceWeakness vulnerable]] to fire.]]
* NotImportantToThisEpisodeCamp: Early on, certain members of the League would be "tied up on urgent cases of their own" depending on the story.
* OhCrap: So many, so many examples. A memorable one happens in ''Justice League United'' when the team runs into a band of bounty hunters. Kara is ''giddy'' because she has to punch them. Animal Man... is not giddy. At all.
-->'''ComicBook/GreenArrow:''' Sardath said this space station was a bit rough... be ready for anything. Supergirl, I hear voices through that door, can you see through it with your X-Ray vision?\\
'''ComicBook/{{Supergirl}}:''' Oh... This is going to be fun!\\
'''Green Arrow:''' Hmmm... What is it, Supergirl? A few alien thugs?\\
'''Supergirl:''' (smiling) No. Much better than that... Bounty hunters. '''Lots''' of them.\\
'''Animal Man:''' ... Oh Crapballs.
* OldShame: More than once in-universe characters have thrown pall on the JLI days.
* OnceMoreWithClarity: The Free Comic Book Day issue for 2012 has not-yet-introduced Green Lantern Simon Baz attacking Batman amidst an all out brawl between the Justice League, the Justice League of America, and Justice League Dark, with Mera thrown into the mix. ''Trinity War'' shows how they got there (and that Mera is actually J'onn).
* OutOfGenreExperience: "Panic from a Blackmail Box", from ''JLA'' Vol. 1 #62, is essentially a crime drama with the JLA shoehorned in.
* {{The Paragon}}s: There are many superhero teams in the [=DCU=]... but there's them, and there's The League. They are the greatest, most powerful and most admirable of them all. A hero making it into the Justice League basically graduated into hanging with the big boys.
* PhantomZone: Creator/GrantMorrison's ''JLA'' introduces the Still Zone, where the League battle the White Martians and, later, Prometheus. According to these stories, the Still Zone (or, as Prometheus call it, the Ghost Zone), which the White Martians use in place of {{Hyperspace}}, is both the Phantom Zone and (according to the angel Zauriel) Limbo...and probably also the Stasis Zone that was at the time standing in for the Phantom Zone in [[ComicBook/{{Legion of Super-Heroes}} M'Onel's]] origin and the Buffer Zone that [[IntangibleMan Bgzltians phase into]]. A subsequent story adds [[TimeMaster Epoch's]] "timeless void" and ComicBook/DCOneMillion's "tesseract space" to the list. And then Morrison's ''ComicBook/TheMultiversity'' reveals that the Phantom Zone is actually TheUnderworld.
* PlotTailoredToTheParty: A staple of the Gardner Fox era, and [[LampshadeHanging lampshaded]] in Steve Engelhart's run in an issue where Aquaman, the Atom, and Elongated Man reflect on the way they seem to be in the League entirely for those moments where only their powers can contribute.
* PopularityPolynomial:[[invoked]] By 1965, Superman, Batman, the Flash, Green Lantern, and Hawkman were enjoying high sales in their main comics, so they became prominent in ''JLA'' stories, while Wonder Woman and the Atom would occasionally participate and Green Arrow, the Martian Manhunter, and Aquaman were frequently sent to NotImportantToThisEpisodeCamp due to the low sales of their own comics. Then [[Series/{{Batman}} Bat-Mania]] happened, and Batman became the main attraction.
* RetCanon: The Hall of Justice. It first appeared in the ''WesternAnimaion/{{Superfriends}}'' cartoon, then it was incorporated into the DCU as an HQ for the League.
* RevengeBeforeReason: In the New 52 run, an author named David Graves and his family are infected by an incurable disease, simply because they were near an opening Boom Tube. The illness kills Graves' family, which he blames on the Justice League. So he decides to go get superpowers and attack them for this.
* RodAndReelRepurposed: In Justice League of America v1 #6, the League investigate a series of apparently impossible museum thefts which turn to have been carried out by an expert fisherman casting a line through the museum window and "catching" valuable artifacts.
* RoguesGallery: Not only do the individual Rogues Galleries of the members antagonize them, but the team itself has its own unique rogues gallery, including Starro, Amazo and Despero.
* SacrificialPlanet: The various Justice League'' "Crisis" team-ups with the Justice Society occasionally used Earth-2 as a Sacrificial Planet in much the same way; at least two of the crossovers involved the temporary destruction of Earth-2 by some cosmic menace. Luckily, though, StatusQuoIsGod and the ResetButton kicked in by the end.
* SealedEvilInASixPack: At one point, they trapped Doomsday within four teleporters on the moon, being unable to fully think enough to attempt an escape.
* ShoutOut: Creator/GrantMorrison's ''JLA'':
** ComicBook/PlasticMan is basically portrayed as a Creator/JimCarrey character; a cross between Film/AceVentura and Film/TheMask, complete with their {{Catchphrase}}s.
** When Johnny Thunder's Thunderbolt first appears to Jakeem, he says "[[Disney/{{Aladdin}} You ain't ever had a friend like me!]]"
* TheSmurfettePrinciple: When the ''Justice League Of America'' started in 1960, Franchise/WonderWoman was the only female member, and though not ''necessarily'' the weakest, was certainly the most resembling. At least the early Gardner Fox stories treated her like the other members, and not like TheChick. Though she soon became the secretary at the JLA's meetings, taking minutes and so on. It took almost a decade before ComicBook/BlackCanary became the second female member (and that was only after Wonder Woman had resigned; it would take several more years before there was more than one woman on the team).\\\
To add insult to injury, the JLA '''rejected''' a female member prior to letting Black Canary in: Hawkgirl was specifically disallowed, initially because the bylaws required they only let in one new member at a time, and they had just let in Comicbook/{{Hawkman}}. Later, she was kept out because her powers duplicated Hawkman's, so she brought nothing new to the table. Hawkman, of course, only has flight and scientific/detective skills ([[ContinuitySnarl usually]]), thus is made completely redundant by Superman and Batman, but nobody moved to kick Hawkman out on these grounds. Hawkgirl was finally allowed in in the 70s, when the writers caught up with the sexual revolution.
* SpiritualSuccessor: Of the ComicBook/JusticeSocietyOfAmerica.
* StarfishAlien: Starro is a TropeCodifier.
* SuperCellReception: The Super Buddies are sent by ComicBook/BoosterGold to 'the deepest, darkest pits of Hell! (muahahaha!)' and are able to call their headquarters. It's {{lampshaded}} when Max Lord immediately demands to know what service they have.
* TakeThat:
** The Grant Morrison era takes a few shots at the NinetiesAntiHero archetype, most notably with the Hyperclan, the Ultramarines and with the formerly harmless and benevolent QWSP becoming a supervillain because he saw that Aquaman had become superficially darker and grittier and decided to go along with it.
** Additionally, Morrison also goes after what he sees as previous Dork Ages or poor creative choices. Plastic Man makes fun of the Elongated Man on several occasions, Batman snidely dismisses the Gerard Jones-era League when they move into the satellite and a number of the characters from the Task Force spinoff of that period return as antagonists in a later arc, and the final issue ends with Doctor Destiny scheming to "de-imagine Detroit" (referencing the "Detroit League" mentioned above).
* ThouShaltNotKill: Most of the team members have this policy on an individual level, but it isn't a rule for the team. The modern Franchise/WonderWoman doesn't adhere to it, and the Green Lanterns were been permitted to use deadly force by their own superiors after ''Sinestro Corps War''. Franchise/{{Superman}} is one of the strictest about adhering to this personally, but as he's explained, he has no right to hold ''other'' heroes to the same standard.
* WestCoastTeam: There was a Justice League International, a Justice League Europe, a Justice Black Ops group, and even an Antarctic League among many others (the page description has a fuller list).