Jack R. Keller (1922 –2003) was an American comic book artist best known for his 1950s and 1960s work on the Marvel Comics Western character Kid Colt, and for his later hot rod and racecar series at Charlton Comics.

Keller began his long association with Kid Colt in Kid Colt, Outlaw #25 (March 1953). He stayed with the character for at least a dozen years in that signature title, as well as in such anthology series as All Western Winners, Two-Gun Western and Gunsmoke Western. In 1955, Keller also began freelancing for the low-budget Charlton Comics, based in Derby, Connecticut, drawing Western and war stories for titles including Billy the Kid, Cheyenne Kid, Battlefield Action, Fightin' Air Force, Fightin' Army, Fightin' Marines and Submarine Attack.

Following the near-demise of Atlas' comic-book line in 1957, and the accompanying cutbacks and firings, Keller supplemented his income by working in a car dealership in his home town. Within two years, he would be back freelancing for Atlas / Marvel. By this time, Keller was also indulging his love of race cars and model cars by writing and drawing such Charlton comics as Grand Prix, Hot Rod Racers, Hot Rods and Racing Cars, Teenage Hotrodders, Drag 'n' Wheels, Surf 'n' Wheels and World of Wheels. He stopped drawing for Marvel Comics by 1967, when Kid Colt, Outlaw had become mostly reprints, then drew a small number of stories for DC Comics from 1968 to 1971, including for the licensed toy-car comic Hot Wheels.