The following is a list of demons, vampires, human monsters, walking dead, ghosts, beasts and any kind of evil being or supernatural creature seen in the Buffyverse (created by Joss Whedon). Demons, Half-Demons and Old Ones

Acathla ("Becoming, Part Two") Ano-Movic Demons: The Straleys ("Bachelor Party") Anyanka Arney ("Offspring", "Lullaby") Artode ("Life of the Party") Assassin demon ("Sanctuary") Avilas ("Help") Baker ("The Ring") Balthazar ("Bad Girls") Barney the Empath Demon ("Parting Gifts") The Beast The Beast of Amalfie ("To Shanshu in L.A." and "Birthday") Billy Blim ("That Vision Thing", "Billy") Bohg'Dar Demon ("Salvage") Boone ("Blood Money") Boretz Demon ("Power Play") Brachen Demons ("Hero") Bringers Bro'os ("Teeth") the Loan-Shark demon ("Tabula Rasa") Brotherhood of Seven: Marc ("The Puppet Show") Senator Helen Brucker Cantonese Fook-Beast ("That Vision Thing") Carlos ("Underneath") Carnyss Demon ("Judgment") Chaos Demon ("Fool for Love") Champion Knight ("Judgment") Clem Codger Demon ("Heartthrob") Connor Cordelia Chase (became part-demon, never used powers for evil) Covenant of Trombli: Silas, Barshon Cyvus Vail Deevak ("First Impressions") Devlin ("Life of the Party") D'Hoffryn D'Hoffryn's acolytes in Arashmahaar ("Something Blue") D'Korr (D'Hoffryn's second demon hitman) ("Get It Done") Doc Doyle Drokken Beast ("Belonging") Drug Lord Demon ("The Prodigal") Durslar Beast ("Fredless") Durthok the Child-Eater ("Judgment") Eater Demon ("Slouching Toward Bethlehem") Eli ("Harm's Way") Eyghon the Sleepwalker ("The Dark Age") Ethros Demon ("I've Got You Under My Skin") Fell Brethren Dr. Fetvanovich ("Quickening") Flanjoid Demon ("To Shanshu in L.A.") Francis ("Release") Frocter Demon ("Release") Sid & Monica Frzylcka ("Double or Nothing") Fungus Demon ("The Harsh Light of Day") Fyarl Demon ("A New Man") Gachnar ("Fear, Itself") Garwak Demon ("Provider") Gathwok Demons: Vakma, Trensiduf ("Over the Rainbow") Gavrok Spiders ("Choices") The Gentlemen and their Silent Footmen ("Hush") Ghora Demon ("Forever") Glarghk Guhl Kashma'nik Demon ("Normal Again") Glory's Minions: Jinx, Dreg, Murk, Slook, Gronx and the High Priest Minion Glurgg ("Apocalypse, Nowish") Gnarl ("Same Time, Same Place") Goran Demons ("The Girl in Question") Granok Demons ("Forgiving") Grappler Demons ("Quickening") Grimslaw Demon ("Selfless") The Groosalugg Grox'lar Beast ("Just Rewards") Hainsley Demon ("Just Rewards") Haklar Demon ("Belonging") Halfrek Hans and Gretta Straus ("Gingerbread") Haxil Beast ("Expecting") Hellhound ("The Prom") The Hellions: Razor, Mag, Klyed ("Bargaining", Parts One and Two) Hellmouth Spawn ("Prophecy Girl", "The Zeppo") Hindu Kush ("Judgment") Howler Demons ("The Ring") Illyria Intestine demon ("Lonely Hearts") Izzerial the Devil Jenoff the Soul-Sucker ("Double or Nothing") Jenoff's Repo-Man ("Double or Nothing") Princess Jheira and the Oden-Tal females ("She") The Judge ("Surprise"), ("Innocence") Kailiff demon/Griff ("Rm w/a Vu") Kamal the Prio-Motu Demon ("Judgment") Karathmamanyugh Demon ("Spin the Bottle") Kathy Newman/Mok'tagar demon ("Living Conditions") Kek Demon ("I've Got You Under My Skin") Ken and the demon enslavers ("Anne") Der Kindestod ("Killed by Death") Kith'Harn Demons ("Origin") Kleynach Demon ("Reprise") Kovitch Demon ("She") Kulak of the Miquot Clan ("Homecoming") Kungai Demon ("Parting Gifts") Kurskov's minions ("Waiting in the Wings") Lachnie Hag ("Benediction") Lagos ("Revelations") Lasovic ("The Ring") Lei-Ach Demons ("Family") Lilliad Demons ("Dad") Lissa ("First Date") Lister Demons ("Hero") Liz ("Judgment") Lohesh (mentioned in "Graduation Day, Part One") Lorne's Id Monster ("Life of the Party") Lubber Demons ("Happy Anniversary") Lurconis ("Band Candy") Lurite Demon ("Heartthrob") Machida ("Reptile Boy") Madam Dorian and her Girls (Lina) ("War Zone") Mandraz ("Wrecked") M'Fashnik Demon ("Flooded") Mayor Richard Wilkins III aka Olvikan Mellish ("The Ring") M. James Menlo ("The Shroud of Rahmon") Merl Mofo Demon (Lenny Edward's demon muscle) ("War Zone") Mohra Demon ("I Will Remember You") Moloch the Corruptor ("I, Robot... You, Jane") Mordar the Bentback ("Judgment") Mucus Demon ("Double or Nothing") Multi-headed demon ("Supersymmetry") Mutite Demon ("Heartthrob") Nahdrah Demons ("Provider") Nezzla Demons ("Judgment") Norman Pfister ("What's My Line", Parts One and Two) Nurbatch Demon ("That Old Gang of Mine") Octarus (""What's My Line", Part Two) Olvikan ("Graduation Day, Part Two") Ovu Mobani ("Dead Man's Party") Piasca demon ("Lonely Hearts") Pockla Demon ("Dead End") Polgara Demons ("The I in Team") Prechian Demon ("The Thin Dead Line") Preggothian Demon ("Blind Date") Pyleans: Lorne, Constable Narwek, Landok, Numfar, Blix, Lorne's Mother (Deathwok clan), Pylean Royal Guard: The Captain of the Guard Queller Demon ("Listening to Fear") Quor-Toth Demon ("The Price") Rahmon ("The Shroud of Rahmon") Reptilian Demon ("Parting Gifts") Rodentius Demon ("Fredless") Rwasundi Demons ("Dead Things") Sahjhan Sahrvin Demons Sathari ("Power Play") The Scourge: Trask, Tiernan ("Hero") Archduke Sebassis Sebassis' Slave/Pee-Pee Demon Senih'D Demon ("Couplet") The Senior Partners of Wolfram & Hart Serparvo Demon ("Something Blue") Shorshack Demon ("I've Got You Under My Skin") Sloth Demon ("Judgment") Sorialus the Ravager ("Waiting in the Wings") Shur-Hod Demons ("Heartthrob") Sisterhood of Jhe ("The Zeppo") Skench Demon ("Double or Nothing") Skilosh Demons ("Epiphany") Skip Skyler ("Enemies") Slime Demon ("The Wish" & "To Shanshu in L.A.") Dr. Gregson the Slod Demon ("Heartthrob") Sluggoth Demon ("Beneath You") Smile Time Puppet-Demons: Polo, Ratio Hornblower, Flora, Groofus ("Smile Time") Soul-Eater ("Calvary") Stewart Burns ("Hell's Bells") Strom Demon ("Release") Suvolte Demon ("As You Were") Sweet ("Once More, With Feeling") Sweet's Lackeys ("Once More, With Feeling") Tarval Demon ("Expecting") Talamour/Burrower ("Lonely Heart") Taparrich and the Mok'tagar demons ("Living Conditions") Tezcatcatl ("The Cautionary Tale of Numero Cinco") The Thaumogenic Demon ("After Life") Thesulac Demon ("Are You Now or Have You Ever Been") Thraxis ("Life of the Party") Tien Shenin ("Judgment") Tom Cribb ("The Ring") Tor ("The Trial") Torto Demon ("Happy Anniversary") Torg ("Showtime") Toth ("The Replacement (Buffy the Vampire Slayer)") Tough Guy Demon ("That Old Gang of Mine") Tree Demon ("Couplet") Turfog the Thrall Demon ("Dear Boy") Vahrall Demons ("Doomed") Vajnu Demon ("The Shroud of Rahmon") Val Trepkos ("The Ring") Vampire Detector Demons ("Blind Date") Vartite Monster ("Judgment") Vigaries ("She") Vinji Demons ("Harm's Way") Vocah, Warrior of the Underworld, Bringer of Calamity ("To Shanshu in L.A.") Voynok Demon ("Supersymmetry") Vyasa ("The Shroud of Rahmon") Wan-Shang Dhole ("That Vision Thing") Wainakay Demon ("Happy Anniversary") Wolfram & Hart Failsafe Technician Demon ("You're Welcome") Wolfram & Hart Torturer Demon ("Underneath") Wraithers ("Loyalty") Whistler Yeska the Davric Demon ("Guise Will Be Guise") The Zealots of the Devourer: The High Priest Zealot, the Keeper of the Name ("Sacrifice", "Peace Out")

Vampires

Absalom ("When She Was Bad") Alonna Gunn Alphonse ("Doppelgangland") Andrew Borba ("Never Kill a Boy on the First Date") Andrew Hoelich ("Anne") Angel/Angelus Anne ("Lies My Parents Told Me"), Spike's mother Aurelius, who prophesied the coming of the Anointed One Big Ugly Billy "Ford" Fordham ("Lie to Me") Blair ("Helpless") Boone ("Who Are You?") Charles Gunn ("After the Fall") Charlotte ("Sleeper") Collin, the Anointed One Dalton Darla Doug Sanders Dracula ("Buffy vs. Dracula") Drusilla El Eliminati ("Bad Girls") Elisabeth The Gorch family: Lyle, Tector, and Candy ("Bad Eggs", "Homecoming") Harmony Kendall Holden Webster ("Conversations with Dead People") James Jamie ("Pangs") Jay-Don ("The Shroud of Rahmon") Jeff & Mutt ("Crush") Jesse McNally Julia ("Lie to Me") Kakistos ("Faith, Hope & Trick") Stephen Korshak ("Some Assembly Required") Lean Boy Lenny ("Lovers Walk") Luke Marcus ("In the Dark") The Master Buffy Summers ("Nightmares") Nostroyev ("Why We Fight") Prince of Lies ("Why We Fight") Rebel Vampire Posse: Carl, Justin, Zack, Glenn, Christy, Marla and others ("All the Way") Richard ("Lies My Parents Told Me") Russell Winters ("City Of") Sam Lawson ("Why We Fight") Mr. Sanderson ("Gingerbread") Sandy ("Doppelgangland", "Family", "Shadow") Sarah Holtz Spike Sunday and her gang: Dav, Rookie, Tom, Jerry and Eddie ("The Freshman") Theresa Klusmeyer ("Phases") Thomas ("Welcome to the Hellmouth") The Three ("Angel") The Three Sisters ("Buffy vs. Dracula") Tom ("The Harsh Light Of Day") Mr. Trick Turok-Han vampires Ul'thar Vampires Whip and the Hooker Vamps ("Into the Woods") Wishverse Willow ("The Wish", "Doppelgangland") Wishverse Xander ("The Wish") Zachary Kralik ("Helpless")

Wizards, witches, sorcerers and other magic users

Madam Anita ("Couplet") Captain Atkinson ("The Thin Dead Line") Helen Bointon ("Happy Anniversary") Magnus Bryce ("Guise Will Be Guise") Jenny Calendar Cordelia Chase (through the former power Jasmine; notably in "Orpheus" and "Inside Out") Command Central witches ("The Long Way Home" onwards) Michael Czajak ("Gingerbread") The Order of Dagon ("No Place Like Home") The Devonshire Coven (mentioned in "Grave" and "Lessons") Lucien Drake ("Soul Purpose") Rupert Giles Magnus Hainsley ("Just Rewards") Clan Kalderash: Enyos Kalderash, Magda Kalderash (The Elder Woman) Kumiko ("Wolves at the Gate, Parts 1-4") Count Kurskov ("Waiting in the Wings") Paul Lanier ("Guise Will Be Guise") Jonathan Levinson Allen Lloyd ("Sense & Sensitivity") Tara Maclay Catherine Madison ("Witch") Amy Madison ("Witch") Mistress Meerna ("A New World") Gwendolyn Post ("Revelations") Rack ("Wrecked", "Seeing Red", "Two to Go") Ethan Rayne Roden ("No Future For You, Parts 1-4") Marcus Roscoe ("Carpe Noctem") Willow Rosenberg Professor Oliver Seidel ("Supersymmetry") The Shadow-Men ("Get It Done") Spanky ("Conviction") Svear Priestesses ("Soulless") Thelonious ("I, Robot... You, Jane") Vaughne and the UC Sunnydale Wiccan Group ("The Killer in Me") Andrew Wells Wo-Pang of the Kung Sun Dai ("Awakening") Wesley Wyndam-Pryce

Enhanced humans

Brain Man ("That Vision Thing") Vanessa Brewer ("Blind Date") Caleb Bethany Chaulk ("Untouched") Command Central psychics and seers ("The Long Way Home" onwards) Connor The Holy Triumvirate (The Three Blind Seer Children) ("Blind Date") Mayor Richard Wilkins III Ronald Meltzer ("I Fall to Pieces") Cassie Newton ("Help") Gwen Raiden Marcie Ross and other Invisible Students ("Out of Mind, Out of Sight") Slayers Wolfram & Hart's Psychics ("Blind Date", "Quickening", "Hell Bound") Wolfram & Hart's Telekinetic Ninja Assassin ("Quickening")

Dangerous mortals

Hunt Acrey ("Redefinition") Richard Anderson ("Reptile Boy") Ryan Anderson ("I've Got You Under My Skin") Dr. Francis Angleman Benny, Mr. Bryce's bodyguard ("Guise Will Be Guise") Ilona Costa Bianchi ("The Girl in Question") The Biker Gang ("Dad") Billy's Kiddy League Coach ("Nightmares") Congressman Nathan Blim ("Billy") Brittany ("Harm's Way") Gib Cain ("Phases") Charlotte ("Harm's Way") Mr. Chaulk ("Untouched") Wilson Christopher and the Haxil's Cult Guys ("Expecting") Jacob Crane ("Unleashed") Cyril, W&H's mailboy ("Quickening") Danny ("Harm's Way") Debbie ("Salvage") Lee DeMarco ("The House Always Wins") Dick the Pimp ("Five by Five") Lenny Edwards ("War Zone") Elliot ("Ground State") Emil the Arms Dealer ("Lineage") Eric ("Some Assembly Required") Bret Folger ("Five by Five")