Shawn Thornton (born on July 23, 1977 in Oshawa, Ontario, Canada) is a Canadian professional hockey forward for the Boston Bruins of the National Hockey League. He is known to be an enforcer.

He was drafted by the Toronto Maple Leafs in 1997 190th overall. He won the Stanley Cup in 2007 with the Anaheim Ducks.

On July 1, 2007, he became an unrestricted free agent and signed an undisclosed multi-year deal with the Boston Bruins.