ECAC Lacrosse League

The ECAC Lacrosse League was an American NCAA Division I college athletic conference and part of the Eastern College Athletic Conference. Founded in 1999 with play beginning in 2000, this part of the conference only sponsored men's lacrosse. It disbanded at the end of the 2014 season as an indirect result of the early-2010s NCAA conference realignment.

The founding members included Georgetown University, Pennsylvania State University (Penn State), Rutgers University, Stony Brook University, the University of Massachusetts Amherst, and the United States Naval Academy. In 2005, Loyola College in Maryland, Hobart College, and St. John’s University joined the ECAC. And in 2006, Fairfield University joined the league. In 2010, the league added Air Force, Bellarmine, Denver, Ohio State and Quinnipiac, replacing Georgetown, Rutgers and St. John's, who left for the original Big East Conference, and Massachusetts and Penn State, who left for the Colonial Athletic Association. In 2011, the ECAC added the University of Michigan Wolverines who were making their move from club level to NCAA Division I. They became full members in 2013, the same year in which Loyola's lacrosse team joined the rest of the school's sports in the Patriot League.