With a legacy that spans over 70 ''years'' (and that's just real-time), and practically ''drenched'' in {{Legacy Character}}s, it's no surprise the Flash family has a ton of major and supporting characters. Now split into pages.
'''Main DCU:'''
* [[Characters/TheFlashTheFlashes The Flashes]]
* [[Characters/TheFlashSupportingCharacters Supporting Characters]]
* [[Characters/TheFlashEvilSpeedsters Evil Speedsters]]
* [[Characters/TheFlashTheRogues The Rogues]]
* [[Characters/TheFlashOtherSpeedsters Other Speedsters]]
* [[Characters/TheFlashOtherVillains Other Villains]]

'''Live-Action TV Series:'''
* ''Characters/TheFlash1990'' [[note]]Barry Allen / The Flash, Tina [=McGee=], Henry Allen, Nora Allen, Jay Allen (Jay Garrick), Iris West, Sam Scudder / Mirror master, Leonard Wynters / Captain Cold (Leonard Snart), James Jesse / The Trickster[[/note]]
* ''Characters/TheFlash2014''
** ''Characters/ArrowverseWestAllenFamily'' [[note]]Barry Allen / The Flash, Iris West, Wally West / Kid Flash, Joe West, Henry Allen, Nora Allen, Francine West[[/note]]
** ''Characters/ArrowverseOtherEarths'' [[note]]Jay Garrick / The Flash, James Jesse / The Trickster, The Flash, Shade, Grodd[[/note]]
** ''Characters/ArrowverseCentralCityCitizens'' [[note]]Linda Park, Eddie Thawne (Malcolm Thawne), David Singh, Tina [=McGee=], Patty Spivot, Hunter Zolomon[[/note]]
** ''Characters/ArrowverseSTARLabs'' [[note]]Harrison "Harry" Wells (Johnny Chambers / Johnny Quick), Jesse Chambers Wells / Jesse Quick, Julian Albert Desmond / Dr. Alchemy, Hartley Rathaway / Pied Piper[[/note]]
** ''Characters/ArrowverseTimeCriminals'' [[note]]Eobard Thawne / Reverse Flash[[/note]]
** ''Characters/ArrowverseOtherEntities'' [[note]]Speed Force, Hunter Zolomon / Zoom / Black Flash, Savitar[[/note]]
** ''Characters/ArrowverseTheLegends'' [[note]]Leonard Snart / Captain Cold, Mick Rory / Heat Wave[[/note]]
** ''Characters/ArrowverseCentralCityCriminals'' [[note]]Lisa Snart / Golden Glider, James Jesse / The Trickster I, Axel Walker / The Trickster II, Lewis Snart, Jared Morillo / Plunder[[/note]]
** ''Characters/ArrowverseMetahumans'' [[note]]Grodd, Mark Mardon / Weather Wizard, Frankie Kane / Magenta, Sam Scudder / Mirror Master, Rosalind Dillon / The Top, Clyde Mardon, Tony Woodward / Girder, Shawna Baez / Peek-A-Boo, Jeremy Tell / Double Down, Russell Glosson / The Turtle, Joey Monteleone / Tar-Pit, Eliza Harmon / Trajectory, Griffin Grey, Edward Clarriss / TheRival, Frankie Kane / Magenta, Shade, Clive Yorkin[[/note]]
** ''Characters/ArrowverseStarCityCriminals'' [[note]]Digger Harkness / Captain Boomerang, Michael Amar / Murmur[[/note]]
** ''Characters/ArrowverseEarth2'' [[note]]Barry Allen, Iris West-Allen, Joseph West, Nora Allen, Linda Park / Dr. Light, Patty Spivot, David Singh, James Zolomon, Ashley Zolomon, Evan [=McCulloch=] / Mirror Master, Solovar[[/note]]
** ''Characters/ArrowverseFutureCharacters'' [[note]]Barry Allen / The Flash, Iris West-Allen, Julie Greer[[/note]]
* ''[[Characters/SmallvilleClarksAllies Smallville]]'' [[note]]Bart Allen / The Flash[[/note]]

* ''Characters/DCExtendedUniverse''
** [[Characters/DCEUJusticeLeague Justice League]] [[note]]Barry Allen / The Flash[[/note]]
** [[Characters/DCEUCentralCity Central City]]
** [[Characters/DCEUTaskForceXCriminals Task Force X Criminals]] [[note]]Digger Harkness / Captain Boomerang[[/note]]

'''Western Animation:'''
* ''Characters/TheBatman'' [[note]]Barry Allen / The Flash, Mirror Master[[/note]]
* ''Characters/BatmanTheBraveAndTheBold'' [[note]]Barry Allen / The Flash II, Eobard Thawne / Prof. Zoom, Jay Garrick / The Flash I, Wally West / Kid Flash, Grodd[[/note]]
* ''Characters/DCAnimatedUniverse''
** ''Characters/JusticeLeagueTheLeague'' [[note]]Wally West / The Flash[[/note]]
** ''Characters/JusticeLeagueSecretSociety'' [[note]]Grodd[[/note]]
* ''Characters/YoungJustice''
** ''Characters/YoungJusticeTheTeamSeasonOne'' [[note]]Wally West / Kid Flash[[/note]]
** ''Characters/YoungJusticeTheTeamSeasonTwo'' [[note]]Bart Allen / Impulse / Kid Flash II[[/note]]
** ''Characters/YoungJusticeJusticeLeague'' [[note]]Barry Allen / The Flash II[[/note]]
** ''Characters/YoungJusticeOtherHeroes'' [[note]]Jay Garrick / The Flash I[[/note]]
** ''Characters/YoungJusticeMinionsOfTheLight'' [[note]]Leonard Snart / Captain Cold[[/note]]
** ''Characters/YoungJusticeOtherCharacters'' [[note]]Iris West-Allen[[/note]]