The Fairfield Stags men's lacrosse team represents Fairfield University in Fairfield, Connecticut and competes in the Colonial Athletic Association of NCAA Division I. The Stags have won eight regular season conference titles since 1996 and competed in the NCAA Division I men's lacrosse tournament in 2002 and 2005. The Stags play their home games at the new lacrosse-only Rafferty Stadium.

Fairfield University is a private Jesuit university in Fairfield, Connecticut. It was founded by the Jesuits in 1942. In 2023, the university had about 5,000 full-time undergraduate students and 1,200 graduate students, including full-time and part-time students. It offers bachelor's degrees, master's degrees, and doctoral degrees through its five schools and colleges.