1991 NCAA Division I men's lacrosse tournament

The 1991 NCAA Division I lacrosse tournament was the 21st 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 1991 NCAA Division I men's lacrosse season.

North Carolina defeated Towson State in the championship game, 18–13, completing a perfect season (16-0) while also capturing the program's fourth NCAA national title.

Towson State, coached by Carl Runk, became the first unseeded team to reach the NCAA Division I lacrosse finals. The Tigers got as close as 12–11 at the start of the 4th quarter, scoring 5 straight goals. Despite these efforts, North Carolina controlled the remainder of the game, winning the national title for the first time since 1986.

The 1991 tournament championship game was played at the Carrier Dome at Syracuse University in Syracuse, New York, with 8,293 fans in attendance.

Bracket

 * Asterisks indicate overtime periods

Finals

 * May 27, 1991

Tournament notes

 * Syracuse sets a new tournament record scoring 28 goals in their first round victory over Michigan State.