Killer is the fourth studio album by American rock band Alice Cooper, released in November 1971 by Warner Bros. Records.

[6] According to an NPR radio interview with Alice Cooper, "Desperado" was written about Robert Vaughn's character from the movie The Magnificent Seven (1960).

The song "Dead Babies" stirred up some controversy following the album's release, despite the fact that its lyrics conveyed an "anti-child abuse" message.

"[8] Robert Christgau rated the album a B−, stating that "a taste for the base usages of hard rock rarely comes with a hit attached these days, much less 'surreal', 'theatrical', and let us not forget 'transvestite' trappings".

Killer is the third-most-represented album in Alice Cooper's concert setlists behind Welcome to My Nightmare (1975) and Billion Dollar Babies (1973), accounting for 13.3 percent of the songs he has played live.

Guns N' Roses (featuring Alice Cooper) covered the song "Under My Wheels" on the soundtrack of The Decline of Western Civilization Part II: The Metal Years (1988).