Eric Sinclair (born William Allison Walker; April 26, 1922 – January 26, 2004) was an American film and television actor. He is best known for appearing in War of the Satellites (1959), Ma Barker's Killer Brood (1960), Butch Cassidy and the Sundance Kid (1969).
Sinclair starred with Jane Withers in the film Faces in the Fog.
Sinclair died in January 2004 in Los Angeles, California at the age of 81. He was buried in Kensico Cemetery in Valhalla, New York.