James Magnus Watt (born May 11, 1950) is an American retired professional ice hockey goaltender.

He played one game in the National Hockey League, with the St. Louis Blues during the 1973–74 season.

The rest of his career, which lasted from 1972 to 1977, was spent in the minor leagues Watt was born in Duluth, Minnesota.

Watt also played for the American national team at the 1972 World Championships in the B Pool.

This biographical article relating to an American ice hockey goaltender is a stub.