John Colicos (December 10, 1928 - March 6, 2000) was a Canadian born actor. He is perhaps best remembered for playing the Klingon Kor in Star Trek, as well as playing Count Baltar in the original Battlestar Galactica movie and television series.

Colicos has the distinction of being the first Klingon seen in the Star Trek franchise. About 30 years after his initial appearance in Star Trek, Colicos reprised his role as the 140-year-old Kor for three episodes in Star Trek:Deep Space Nine. He also appeared in TV commercials in the 1990s for America's Best Contacts & Eyeglasses.

Colicos' final acting appearance was his reprise of Count Baltar in the concept demonstration trailer "Battlestar Galactica: The Second Coming," aired at many science fiction conventions in 1999.