The Chicago native penned music for "The Andy Griffith Show," "The Dick Van Dyke Show," "I Spy," "That Girl," "Make Room for Daddy," "Gomer Pyle, U.S.M.C.," "The Mod Squad" and "Mickey Spillane's Mike Hammer," the Los Angeles Times reported.
The Times said Hagen died Monday night after being ill for several months.
"There is no question in my mind that Earle Hagen is one of the most important composers in the history of television, if not the most important," said Jon Burlingame, author of the book "TV's Biggest Hits." "There was very little original music being composed for television. He was one of the very few people who took the leap and saw the potential of music for television in terms of what could be accomplished dramatically and comedically."