J.D. Cannon (born April 24, 1922 in Salmon, Idaho; died May 20, 2005 in Hudson, New York), was an American actor. Also known as John Donovan Cannon, he attended the American Academy of Dramatic Arts and is probably best known for his costarring role of Chief Clifford in the television series McCloud, and for his role in Cool Hand Luke. Cannon also played General Hampton on Call to Glory (1984).
Cannon was also a recurring character or the short-run American western program Alias Smith and Jones playing a lawman working for the Bannerman Detective Agency named Harry Briscoe.
Furthermore, he appeared in many guest roles through his acting career.
Cannon's last television acting appearance was on Law & Order in 1991.
Cannon is also noted as serving in the army in World War II.