As may be expected of a show that's run thirty-five seasons over fifty years, there are ''lots'' of characters here.

For an index of the actors and actresses of the ''Whoniverse'' who have their own page on this wiki, see [[UsefulNotes/WhoniverseActors here]].

'''Note that almost all spoilers on the subpages up to and including Series 9 have been unmarked, and even images on some pages contain spoilers'''.

These are for the main TV series (''Series/DoctorWho'', obviously):
* [[Characters/DoctorWhoDoctors The Doctor]]
** [[Characters/DoctorWhoFirstDoctor First Doctor]]
** [[Characters/DoctorWhoSecondDoctor Second Doctor]]
** [[Characters/DoctorWhoThirdDoctor Third Doctor]]
** [[Characters/DoctorWhoFourthDoctor Fourth Doctor]]
** [[Characters/DoctorWhoFifthDoctor Fifth Doctor]]
** [[Characters/DoctorWhoSixthDoctor Sixth Doctor]]
** [[Characters/DoctorWhoSeventhDoctor Seventh Doctor]]
** [[Characters/DoctorWhoEighthDoctor Eighth Doctor]]
** [[Characters/DoctorWhoWarDoctor War Doctor]]
** [[Characters/DoctorWhoNinthDoctor Ninth Doctor]]
** [[Characters/DoctorWhoTenthDoctor Tenth Doctor]]
** [[Characters/DoctorWhoEleventhDoctor Eleventh Doctor]]
** [[Characters/DoctorWhoTwelfthDoctor Twelfth Doctor]]
** [[Characters/DoctorWhoThirteenthDoctor Thirteenth Doctor]]
* [[Characters/DoctorWhoTheTARDIS The TARDIS]]
* [[Characters/DoctorWhoCompanionsAndSupportingCast Companions and Supporting Cast]]
** [[Characters/DoctorWhoClassicSeriesCompanions Classic Series Companions]][[note]]Susan Foreman, Barbara Wright, Ian Chesterton, Vicki, Steven Taylor, Katarina, Sara Kingdom, Dorothea "Dodo" Chaplet, Ben Jackson, Polly, Jamie [=McCrimmon=], Victoria Waterfield, Zoe Heriot, Dr. Elizabeth "Liz" Shaw, Josephine "Jo" Grant, Harry Sullivan, Adric, Nyssa of Traken, Tegan Jovanka, Vislor Turlough, Kamelion, Perpugilliam "Peri" Brown, Melanie "Mel" Jane Bush, Dorothy "Ace" Gale [=McShane=], Dr. Grace Holloway[[/note]]
*** [[Characters/DoctorWhoSarahJaneSmith Sarah Jane Smith]]
*** [[Characters/DoctorWhoLeela Leela of the Sevateem]]
*** [[Characters/DoctorWhoK9 K-9]]
*** [[Characters/DoctorWhoRomana Romana]]
** [[Characters/DoctorWhoRevivalSeriesCompanions Revival Series Companions]][[note]]Rose Tyler, Mickey Smith, Adam Mitchell, Donna Noble, Martha Jones, Wilfred Mott, Amy Pond, Rory Williams, Craig Owens, Nardole, Bill Potts[[/note]]
*** [[Characters/DoctorWhoJackHarkness Captain Jack Harkness]]
*** [[Characters/DoctorWhoRiverSong River Song]]
*** [[Characters/DoctorWhoRevivalSeriesCompanionsClaraOswald Clara Oswald]]
** [[Characters/DoctorWhoOtherSupportingCast Other Supporting Cast]][[note]]Queen Elizabeth I, Bret Vyon, Alpha, Beta and Omega, Professor Edward Travers, Alpha Centauri, Jago and Litefoot, The White Guardian, The Watcher, Richard Mace, Sabalom Glitz, Chang Lee, Jackie Tyler, Harriet Jones, Prime Minister, Pete Tyler, Sylvia Noble, The Jones family, Jenny, The "Meta-Crisis" Tenth Doctor, Dorium Maldovar, Canton Everett Delaware III, Madame Vastra, Jenny Flint, Strax, The Teselecta, Madge Arwell, Brian Williams, Angie and Artie Maitland, Cass, Ohila, The Moment, "The Curator", Handles, Tasha Lem, Danny Pink, Courtney Woods, Rigsy, Santa Claus, Ashildr, Grant, Heather, The Captain[[/note]]
** [[Characters/DoctorWhoUNITStaff UNIT Staff]] [[note]]John Benton, Mike Yates, Kate Stewart, Osgood[[/note]]
*** [[Characters/DoctorWhoBrigadierLethbridgeStewart Brigadier Lethbridge-Stewart]]
* [[Characters/DoctorWhoVillains Villains]][[note]]The Monk, Mavic Chen, The Celestial Toymaker, The Great Intelligence, The War Chief, Chancellor Goth, Nestene Consciousness, Omega, Sutekh, Morbius, Borusa, Magnus Greel, Black Guardian, The Mara, Rassilon, Commander Gustave Lytton, Sil, The Rani, The Valeyard, The Kandyman, Fenric, Cassandra O'Brien.Δ 17, The Beast, Lucy Saxon, The Dream Lord, Madame Kovarian, Mr. Clever, Half-Face Man, Gus, The Foretold, Seb, Colony Sarff, The Fisher King, Bonnie the Zygon, Lord Sutcliffe, The Giant Monk, Queen Iraxxa, The Hospital Staff[[/note]]
** [[Characters/DoctorWhoMasters The Master]]
* [[Characters/DoctorWhoAliensAndMonsters Aliens and Monsters]][[note]]Thals, Zarbi, Drahvins, Macra, Ice Warriors, Quarks, Krotons, Time Lords, Autons, Homo Reptilia, Axons, Ogrons, Peladonians, Draconians, Sontarans, Wirrn, Zygons, Krynoid, Rutans, Movellans, Nimons, Trions, Eternals, Slitheen, Roboforms, Sycorax, Clockwork Droids, Ood, Judoon, Weeping Angels, Adipose, Vashta Nerada, The Silent Priests, Gangers, Tivolians, The Boneless, Dream Crabs, The Pilot, Emojibots, The Dryads, The Monks, The Eaters of Light, The Testimony[[/note]]
** [[Characters/DoctorWhoCyberman Cybermen]][[note]]Cybermen, Cyber-Leader, Mr. Clever, The Hospital Staff, Cybus Cybermen, John Lumic[[/note]]
** [[Characters/DoctorWhoDalek Dalek]][[note]]Daleks, Dalek Emperor, Davros, Kaleds, Cult of Skaro, Dalek Time Controller, Quasimodo Dalek, Dalek Prime Minister, Volatix Cabal, Rusty[[/note]]

For the Franchise/{{Whoniverse}} spinoffs:
* Characters/BigFinishDoctorWho, comprising:
** Characters/BigFinishDoctorWhoDoctors
** Characters/BigFinishDoctorWhoCompanions
** Characters/BigFinishDoctorWhoVillains
** Characters/BigFinishDoctorWhoUNIT
** Characters/{{Gallifrey}}
* Characters/TheSarahJaneAdventures
* Characters/{{Torchwood}}
** Characters/TorchwoodMiracleDay
* Characters/{{Class|2016}}

{{Expanded Universe}}ly speaking:
* Characters/BerniceSummerfield
* Characters/DoctorWhoMagazine
%% Characters/DoctorWhoMissingAdventures
* Characters/DoctorWhoNewAdventures
* Characters/DoctorWhoTheCurseOfFatalDeath
* Characters/EighthDoctorAdventures
* Characters/IrisWildthyme
* Characters/NewSeriesAdventures
* [[Characters/DrWhoFilms Peter Cushing films]]
* Characters/ScreamOfTheShalka
* Characters/DoctorWhoIDW
* Characters/DoctorWhoTitan
* [[Characters/DoctorWhoExpandedUniverse Other EU miscellany]]