Joseph Adrien Germain Gagnon (December 9, 1942 – October 26, 2014) was a Canadian professional ice hockey player who played 259 games in the National Hockey League.

He played for the Montreal Canadiens, New York Islanders, Chicago Black Hawks, and Kansas City Scouts.

An original Islander, Gagnon recorded three points, including the winning goal, in the Islanders first win on October 12, 1972.

Gagnon returned to Chicoutimi and died there after a long illness on October 26, 2014.

This biographical article relating to a Canadian ice hockey winger born in the 1940s is a stub.