Started in 1952 by faculty member James Brown, a U.S. National Team member and Manchester United player in the 1930s, the team has progressed from playing local schools to competing against the top NEPSAC Class "A" powers. In 2010 and 2016, the team earned bids to the New England Championship Tournament.

Several players have extended their careers collegiately, while other alumni have earned coveted positions on the U.S. National Team as well as becoming professional players in the MLS. Home games are played on Carroll Field at the Middle School campus on King Street. 

Soccer is a popular sport in the Upper School, as Brunswick fields five teams at different levels from varsity to freshman. The Middle School boasts four teams, two apiece at the seventh and eighth grade levels.