John Agar (31 Januarie 1921 – 7 April 2002) was 'n Amerikaanse akteur. Hy was bekend vir sy rolle in die rolprente Fort Apache (1948), Sands of Iwo Jima (1949), The Mole People (1956), en Nightbreed (1990).
- 1948: Fort Apache
- 1949: Sands of Iwo Jima
- 1949: Adventure in Baltimore
- 1949: The Woman on Pier 13
- 1949: She Wore a Yellow Ribbon
- 1950: Breakthrough
- 1951: Along the Great Divide
- 1951: The Magic Carpet
- 1952: Woman of the North Country
- 1953: Man of Conflict
- 1954: Bait
- 1954: The Golden Mistress
- 1954: The Rocket Man
- 1954: Shield for Murder
- 1955: Hold Back Tomorrow
- 1955: The Lonesome Trail
- 1955: Revenge of the Creature
- 1955: Tarantula
- 1956: The Mole People
- 1956: Flesh and the Spur
- 1956: Star in the Dust
- 1957: The Brain from Planet Arous
- 1957: Daughter of Dr. Jekyll
- 1957: Ride a Violent Mile
- 1958: Attack of the Puppet People
- 1958: Frontier Gun
- 1958: Jet Attack
- 1958: The Day of the Trumpet
- 1959: Invisible Invaders
- 1960: Raymie
- 1961: Fall Girl
- 1962: Hand of Death
- 1962: Journey to the Seventh Planet
- 1963: Of Love and Desire
- 1966: Johnny Reno
- 1966: Women of the Prehistoric Planet
- 1967: Night Fright
- 1971: How's Your Love Life?
- 1982: Divided We Fall
- 1988: Miracle Mile
- 1990: Nightbreed
- 2018: Monster Invaders from Space
- 1960: The Best of the Post
- 1995: Words from Jerusalem
- 1959: Destination Space
- 1966: Curse of the Swamp Creature
- 1966: Zontar: The Thing from Venus
- 1968: Hell Raiders
- 1977: The Man with No Name
- 1982: Coming Soon
- 1986: Horrible Horror
- 1991: Amazing Worlds of Science Fiction and Fantasy
- 1993: The Making of 'Sands of Iwo Jima'
- 1993: The Famous Monsters 1993 World Convention Souvenir Video
- 1996: 100 Years of Horror: The Double Demons
- 1996: 100 Years of Horror: The Walking Dead
- 2001: The Vampire Hunters Club
- 2007: The Fearmakers Collection
- 2007: John Wayne Behind the Scenes
