Ken Fantetti (born April 7, 1957) is a former American football linebacker who played in the NFL for the Detroit Lions from 1979 through 1985. Fantetti was born in Toledo, Oregon, in 1957 and played college football at the University of Wyoming from 1975 to 1978. As a senior in 1978, he had 124 tackles, including 73 unassisted tackles, and was selected as an All-American by the Football Writers Association of America. He had 15 unassisted tackles and nine assists in a 1978 game against Utah. He was also selected as the Western Athletic Conference Defensive Player of the Year in 1978.