John Doe (born John Nommensen Duchac on February 25, 1954 in Decatur, Illinois) is an American singer, songwriter, actor, poet and bass player. Doe founded the much-praised L.A. punk band X, of which he is still an active member. His musical compositions and performances span the rock, country and folk music genres. As an actor, he has dozens of television appearances and several movies to his credit, including the role of Jeff Parker in the television series Roswell.

In addition to X, Doe performs with the country-folk-punk band The Knitters and has released records as a solo artist. In the early 1980s, he performed on two albums by The Flesh Eaters.