Ken Regan (15 June 1939 – 25 November 2012) was an American photographer from New York, born in the Bronx and died in Manhattan. The cause of his death was cancer.

He originally made his name in the area of sports photography. Later on he founded his own agency, Camera 5, and began photographing politicians, musicians and actors. He was the official photographer for The Rolling Stones on several tours in the 1970s, Bob Dylan’s Rolling Thunder Revue tour in 1975, and the Live Aid concert in 1985. He was Senator Ted Kennedy’s unofficial personal photographer in the last four decades of his life. He took the pictures documenting Christopher Reeve’s homecoming from rehabilitation after the 1995 fall from a horse that left the actor paralyzed.