Extreme Noise Terror (often abbreviated to ENT) are a British crust punk / grindcore band originally formed in Ipswich, England in 1985. The band are widely considered one of the earliest and most influential European grindcore bands, and particularly the forefathers of the crustgrind subgenre.

Notable for one of the earliest uses of dual vocalists in hardcore punk, and for recording a number of sessions for BBC Radio 1 DJ John Peel, Extreme Noise Terror started as a crust punk band and helped characterise the early, archetypal grindcore sound with fiercely political lyrics, grinding guitars, extremely fast tempo and often very short songs.