Undead is a collective name for supernatural entities that are deceased yet behave as if alive.

Undead or The Undead may also refer to:

Fictional characters Undead (Dungeons & Dragons), a classification of monsters in Dungeons & Dragons Undead (Kamen Rider), a race of monsters in the TV series Kamen Rider Blade Undead (Warhammer), an army of monsters in Warhammer games Undead, a type of character in Heroscape Skeleton (undead), undead manifested as skeletons

Film The Undead (film), a 1957 horror film directed by Roger Corman Undead (film), a 2003 horror comedy film

Music Undead (Six Feet Under album), 2012 Undead (Tad Morose album), or the title song, 2000 Undead (Ten Years After album), 1968 "Undead" (Hollywood Undead song), 2008 "Undead" (Yoasobi song), 2024 "Undead", a song by the Haunted from The Haunted, 1998 "Undead", a song by Sadus from Illusions, 1988 The Undead, an American horror punk band, or a 1995 album by the band

Other uses Undead (series), a series of vampire romance novels by MaryJanice Davidson Undead (board game), a 1981 game from Steve Jackson Games Undead (Mayfair Games), a 1986 supplement for fantasy role-playing games published by Mayfair Games