Paul D'Amour (born May 12, 1967) is an American musician, and the first bass guitarist for Tool. His bass sound was recognized by the aggressive picked tone he developed with his Chris Squire Signature Rickenbacker 4001CS, which can clearly be heard on Tool's first full-length album, Undertow.

D'Amour was born in Spokane, Washington. Originally a guitar player, D'Amour became Tool's bassist after being introduced to the band by guitarist Adam Jones. Like Jones, D'Amour was in Los Angeles because of his wish to enter the film industry.

D'Amour left Tool in 1995. After his departure from the band, he formed the psychedelic pop band Lusk. In 1997, they released their only album, entitled Free Mars. More: