The 2011 NCAA Division I lacrosse tournament was the 41st annual tournament hosted by the National Collegiate Athletic Association to determine the team champion of men's college lacrosse among its Division I programs, held at the end of the 2011 NCAA Division I men's lacrosse season.

[3] The championship game was played at M&T Bank Stadium, the home of the NFL's Baltimore Ravens, in Baltimore, Maryland, with a crowd of 35,661 fans.

During the tournament, Virginia head coach Dom Starsia became the winningest coach in Division I men's lacrosse history, earning his 327th career win in the quarterfinals against Cornell, surpassing Jack Emmer's record of 326.

In addition, the first-round match between Denver and Villanova, held at Peter Barton Lacrosse Stadium on the DU campus on May 15, was historically notable as the first Division I men's tournament game ever to be held west of the Mississippi River.

[4] Sixteen teams were selected to compete in the tournament based upon their performance during the regular season, and for some, by means of a conference tournament.