Chris O'Sullivan (born May 15, 1974) is an American former professional ice hockey defenseman who played in the NHL with the Calgary Flames, Vancouver Canucks, and Mighty Ducks of Anaheim.

O'Sullivan missed the majority of his freshman year (1992–1993) after suffering a neck injury during a game versus Providence College.

The 1996–1997 season would turn out to be O'Sullivan's longest stint in the NHL, playing in 27 games and scoring 10 points.

[citation needed] For the 1999–2000 season O'Sullivan was signed by the Vancouver Canucks.

He played the whole 2000–2001 season with the Cincinnati Mighty Ducks, scoring 49 points in 60 games.