A bleach is a chemical used for lightening or removing color and disinfecting. Bleach may also refer to:

Bleaching of wood pulp, whitening and lignin removal from wood pulp

Bleach: Memories of Nobody, a 2006 film based on the manga

Bleach (2002 film), a 2002 short film starring Brian Austin Green

Bleach (band), a Christian rock group that disbanded in 2004

Bleach (a.k.a. Bleach03 in North America), an all-girl, Japanese punk/hardcore rock band

"Bleach", a single by indie rock band easyworld from the album This Is Where I Stand

Bleach (manga), a manga by Tite Kubo which has also been adapted into an anime, video games, a rock opera and other media

Bleach (album), the debut album of grunge rock band Nirvana

Coral bleaching, a pathological response of coral to environmental stresses