Sleep is an American heavy metal band from San Jose, California. The band earned critical and record label attention early in its career.

Critic Eduardo Rivadavia describes them as “perhaps the ultimate stoner rock band” and notes they exerted a strong influence on metal in the 1990s. However, conflict with its record company contributed to Sleep’s breakup by the end of the decade.

The band reformed in 2009 and has played sporadic live dates internationally since. In 2018, Sleep released their comeback album, The Sciences, on Third Man Records, to critical acclaim.