Peter Henry Fonda (born February 23, 1940) is an American actor. He is the son of Henry Fonda, the brother of Jane Fonda, and the father of Bridget and Justin Fonda (by first wife Susan Brewer, stepdaughter of Noah Dietrich). Fonda is associated with Western counterculture of the 1960s.

Fonda was born in New York City, New York, the son of actor Henry Fonda and his wife Frances Ford Seymour; he is the younger brother of actress Jane Fonda.

On his eleventh birthday, he accidentally shot himself in the stomach and nearly died. Years later, he would reference this incident to John Lennon claiming "I know what it's like to be dead", which ended up becoming an indirect influence behind the Beatles song She Said, She Said.