David Glen Harmon (January 2, 1921 – March 9, 2007) was a Canadian ice hockey defenceman who played for the Montreal Canadiens from 1942 to 1951.

He was born in Holland, Manitoba and died in Mississauga, Ontario.

Harmon's professional hockey career officially began on June 27, 1941, when he was acquired by the Montreal Canadiens from the Tulsa Oilers (AHA) through an inter-league draft; he would play for Montreal for the following 9 years, until his retirement from the NHL.

It was in November 1942 when Harmon stepped onto the ice of the Montreal Forum to play in his first NHL game.

Harmon played his last four seasons with the Montreal Royals of the QHL.