Gregory Sierra (gebore 25 Januarie 1937) is 'n Amerikaanse akteur. Hy is bekend vir sy rolle in die rolprente Beneath the Planet of the Apes (1970), The Towering Inferno (1974), Deep Cover (1992), en Vampires (1998).
- 1970: Beneath the Planet of the Apes
- 1971: Machismo: 40 Graves for 40 Guns
- 1973: The Clones
- 1974: The Towering Inferno
- 1974: Goodnight Jackie
- 1992: Deep Cover
- 1998: Vampires
- 1977: A.E.S. Hudson Street
- 1983: Zorro and Son
- 1988: Something Is Out There
- 1994: 704 Hauser
- 1975: Antonio and the Mayor
- 1975: The Fireman's Ball
- 1982: Farrell for the People
- 1985: Stingray
- 1987: Her Secret Life
- 1989: Desperado: Badlands Justice
