Leslie Edward "Les" Claypool (born September 29, 1963) is an American musician, best known as the lead vocalist and bassist in the band Primus. Claypool's funky, creative playing style on the electric bass mixes finger-tapping, flamenco-like strumming, whammy bar bends (unusual on a bass guitar), a Larry Graham-like slap technique, and Geddy Lee influences.

Claypool has also self produced and engineered his solo releases from his own studio "Rancho Relaxo". 2006 saw the release of a full-length feature film Electric Apricot written and directed by Claypool as well as a debut novel South of the Pumphouse.