"Killing Floor" is a 1964 song by American blues singer-songwriter and guitarist Howlin' Wolf. Called "one of the defining classics of Chicago electric blues", "Killing Floor" became a blues standard with recordings by various artists. It has been acknowledged by the Blues Foundation Hall of Fame, which noted its popularity among rock as well as blues musicians. English rock group Led Zeppelin adapted the song for their "The Lemon Song", for which Howlin' Wolf is named as a co-author.

Chester Arthur Burnett, better known by his stage name Howlin' Wolf, was an American blues singer and guitarist. He was at the forefront of transforming acoustic Delta blues into electric Chicago blues, and over a four-decade career, recorded blues, rhythm and blues, rock and roll, and psychedelic rock. He is regarded as one of the most influential blues musicians of all time.