John Anderson (October 20, 1922 – August 7, 1992) was an American actor.

Prior to a prolific acting career, Anderson served in the United States Coast Guard during World War II where he met artist Orazio Fumagalli who became one of his best lifelong friends.

He was known for several roles, including his recurring and best known role in MacGyver as Harry Jackson, MacGyver's grandfather. Earlier work included appearances on many Western series, including The Californians, Gunsmoke (twelve times), The Rifleman (eleven times), The Virginian (six times), Laramie (five times), The Big Valley in various roles, The Outlaws (twice as Simon Shaw), The Rat Patrol (four times, three as the same character), Overland Trail, The Legend of Jesse James, Man Without a Gun, Hawaii Five-0 and The Life and Legend of Wyatt Earp as Virgil Earp. He portrayed Franklin Delano Roosevelt in the popular TV miniseries Backstairs at the White House (1979). He portrayed the character Kevin Uxbridge in the Star Trek: The Next Generation episode "The Survivors". Anderson played the role of Dr. Herbert Stiles in a series arc of CBS's Dallas.