Helmet is an American alternative metal/post-hardcore band formed in New York City by Page Hamilton (vocals/guitar).

Helmet has released six studio albums and two compilations. The band found mainstream success with their 1992 major label debut Meantime, which debuted at number 68 on the Billboard 200 and spawned the hits "Unsung" and "In the Meantime". Meantime was produced entirely by the band and was certified gold in the U.S. by 1994. The album has sold over 1 million copies worldwide and remains Helmet's top-selling album. After releasing two more albums, Betty and Aftertaste, Helmet broke up in 1998, but reformed in 2004. The band released their first post-reunion album, Size Matters, later that year and it was their last release on their longtime label Interscope Records. They are now signed to Warcon Records, who released their latest album, Monochrome, on July 18, 2006.

Their music is characterized by repetitive, syncopated, staccato guitar riffs, often in odd time signatures, and almost always in a minor key with drop-D or drop-C tuning. The guitar sound is heavily distorted and dissonant.