Peter Stampfel, American fiddle player, violinist, and singer-songwriter (The Holy Modal Rounders)

Peter Stampfel (born October 29, 1938, in Wauwatosa, Wisconsin) is an American fiddle player, old-time musician, and singer-songwriter.

Stampfel is best known as a member of the Holy Modal Rounders, a psychedelic folk band that he founded with Steve Weber in the early 1960s. He was also briefly a member of the Fugs and has been the leader of several musical projects, including the Bottlecaps, the Du-Tels, and the WORM All-Stars. He has performed with They Might Be Giants, the Roches, Richard Barone, Yo La Tengo, Bongwater, Jeffrey Lewis, Michael Hurley, Baby Gramps and Loudon Wainwright III.