The Kohn Squash Pavilion, which stands at the top of the school's new entrance driveway, is the home of Westminster's Boys' and Girls' Squash programs. The facility, which opened in the winter of 2000, gives the Martlets what is arguably the finest squash facility in New England. Internationally ranked player Brett Martin feels it is one of the finest facilities in the world. Spectators can view the action on the eight international courts from a central elevated viewing platform, as well as from balconies that overlook the courts.
Westminster competes annually for the Founders League championship in girls squash, playing one of the strongest schedules in all of New England. Year in and year out, Westminster's girls have been ranked among the top teams in New England. Recent graduates have gone on to play at colleges like Brown, Colby, Bowdoin, and Bates, often being elected captains of their teams.