This is a list of X-Men villains.

• The Brood
• The Phalanx

• Apocalypse || En Sabah Nur
• Moses Magnum

• War
• Famine
• Pestilence
• Death
• Caliban, Wolverine, Angel, Deathbird, Ahab, Polaris, Gambit, Sunfire, and other notable heroes have served in Horseman positions.

• Gauntlet
• Foxbat
• Tusk
• Psynapse
• Barrage
• Hard Drive

• Genesis
• Dirt Nap
• Lifeforce
• Spyne
• Hurricane
• Deadbolt

For a list of members by team incarnation, visit the main article, above.

• Astra (Retconned founding member)
• Avalanche || Dominic Szilard Petros
• Blob || Frederick J Dukes
• Crimson Commando||Frank Bohannon
• Dark Beast
• Destiny || Irene Adler
• Ever
• Fatale First recruit
• Lorelei
• Magneto || Erik Lensherr
• Mastermind || Jason Wyngarde
• Mastermind II || Martinique Jason, daughter to Mastermind I.
• Mystique || Raven Darkholme
• Pyro || St John Allerdyce
• Quicksilver || Pietro Django Maximoff
• Random || Marshal Evan Stone III
• Sabretooth || Victor Creed
• Scarlet Witch || Wanda Maximoff
• Sauron || Karl Lykos
• Spider-Woman II ||Julia Carpenter
• Spiral || Rita
• Stonewall || Louis Hamilton
• Super Sabre || Martin Fletcher
• Toad || Mortimer Tonybee
• Unus the Untouchable || Angelo Uniscione
• Vanisher
• Phantazia || Eileen Harsaw
• Thornn || Lucía Callasantos
• Havok || Alexander Summers
• Aurora || Anne-Marie Beaubier
• X-Man || Nate Grey
• Xorn || Kuan-Yin Xorn
• Basilisk || Bob Smitz
• Beak || Barnell Bohusk
• Ernst || Cassandra Nova Xavier*
• Esme Cuckoo
• No-Girl || Martha Johansson
• Angel Salvadore
• Exodus || Paris Bennett
• Black Tom Cassidy || Thomas Samuel Eamon Cassidy
• Juggernaut (betrayed the team to join the X-Men)
• Nocturne (really infiltrated the team)
• Mammomax

Formerly an incarnation of the Brotherhood of Evil Mutants.

• Burner || Byron Calley
• Lifter || Ned Lathrop
• Peepers || Peter Quinn
• Paralyzer ||Randall Darby, aka Shocker
• Slither || Aaron Salomon
• Quill
• Mist Mistress
• Mentallo || Marvin Flumm, aka "Think Tank"
• Rust

• Sebastian Shaw
• Emma Frost
• Negasonic Teenage Warhead
• Perfection
• Cassandra Nova
• [[Donald Pierce]
• Selene
• Trevor Fitzroy
• Harry Leland
• Tessa

Young counterparts to the New Mutants, under the White Queen's (Emma) tutelage.

• Beef
• Bevatron
• Catseye
• Empath
• Jetstream
• Roulette
• Tarot
• Magma
• Firestar
• Thunderbird (Warpath)

Fought Generation X one time. Only called such in ads.

• Emplate
• Vincente
• Bulwark
• Gayle Edgerton
• Dirt Nap
• Murmur
• D.O.A.

• King Bedlam
• Tarot
• Feral
• Magma
• Paradigm
• Switch
• Bedlam

• Stryfe
• Reignfire
• Collective Man
• Dragoness
• Feral
• Forearm
• Jade Dragon
• Kamikaze
• Locus
• Moonstar
• Nuwa
• Reaper
• Rusty
• Selby
• Skids
• Strobe
• Sumo
• Tempo
• Thumbelina
• Wildside
• Zero

• Lady Deathstrike || Yuriko Oyama
• Donald Pierce
• Cole
• Macon
• Reese
• Bonebreaker
• Skullbuster I
• Skullbuster II (Cylla)
• Pretty Boy
• Elixir

Magneto has lead the Mutates previously, in addition to the following other members.

• Zaladane
• Sauron
• Brainchild
• Amphibius
• Barbarus
• Equilibrius
• Gaza
• Piper
• Leash
• Lorelei
• Lupo
• Lupa
• Vertigo
• Whiteout
• Worm

• Nimrod
• Master Mold

• Mister Sinister || Nathaniel Essex

• Arclight
• Sabretooth
• Harpoon
• Blockbuster
• Malice
• Prism
• Scrambler
• Riptide
• Scalphunter
• Vertigo
• Hans

• Hairbag
• Ruckus
• Gorgeous George
• Slab
• Ramrod

• Shinobi Shaw
• Selene
• Gamesmaster
• Trevor Fitzroy
• Andrea and Andreas Von Strucker

• Mojo
• Major Domo
• Warwolves

These villains normally operate alone, attacking the X-Men, rather than teaming up with a group of allies.

• Kulan Gath
• General Kincaid
• William Stryker
• Krakoa
• Garokk
• Dracula
• Shadow King ||Amahl Farouk
• Dark Phoenix
• Omega Red || Arkady Rossovich
• Proteus
• X-Cutioner

• List of X-Men characters
• List of X-Men teams