Ralph Nelson (12 Augustus 1916 – 21 Desember 1987) was 'n Amerikaanse regisseur, vervaardiger, en akteur. Hy was bekend vir sy rolle in die rolprente Requiem for a Heavyweight (1962), Lilies of the Field (1963), Once a Thief (1965), en Charly (1968).
- 1962: Requiem for a Heavyweight
- 1963: Lilies of the Field
- 1963: Soldier in the Rain
- 1964: Fate Is the Hunter
- 1964: Father Goose
- 1965: Once a Thief
- 1966: Duel at Diablo
- 1968: Charly
- 1968: Counterpoint
- 1970: ...tick... tick... tick...
- 1970: Soldier Blue
- 1971: Flight of the Doves
- 1972: The Wrath of God
- 1975: The Wilby Conspiracy
- 1976: Embryo
- 1978: A Hero Ain't Nothin' But a Sandwich
- 1957: Blood Money
- 1965: The Man Who Bought Paradise
- 1978: Because He's My Friend
- 1978: Lady of the House
- 1979: Christmas Lilies of the Field
- 1979: You Can't Go Home Again
