Serge Beaudoin (born November 30, 1952 in Montreal, Quebec) is a retired professional ice hockey player who played 332 games in the World Hockey Association and 3 games in the National Hockey League. He played for the Phoenix Roadrunners, Cincinnati Stingers, Birmingham Bulls, Vancouver Blazers, and Atlanta Flames.
Beaudoin played junior hockey with the Montreal North Beavers, Laval Saints, and the Trois Rivieres Ducs and got a reputation as a tough player. The Philadelphia Flyers chose him 103rd overall in the 1972 NHL Amateur Draft.
He turned pro with the Roanoke Valley Rebels in 1972-73 and then joined the Vancouver Blazers of the World Hockey Association. He spent the next five years in the WHA, playing in 332 games and scoring 20 goals and 103 assists. He had 519 penalty minutes.
After the WHA folded in 1979, the Atlanta Flames signed him as a free agent and he played three games for them. He was sent down to the Birmingham Bulls of the Central Hockey League. In the 1980-81 season he was suspended by the league for assaulting referee Kerry Fraser. He was also dropped by the Bulls.