William Mulcahy was born on 10 October 1920 in New York City, New York, USA. He was an actor. He was married to Florence Janette Johnson. He died on 6 May 1990 in Honolulu, Hawaii, USA.
Enlisted U. S. Army Air Corps as an Aviation Cadet 29 December 1941 in Los Angeles, California; would retire, after almost thirty years of service, as Colonel, U. S. Air Force.