1991 NCAA Division II men's basketball tournament

The 1991 NCAA Division II men's basketball tournament involved 32 schools playing in a single-elimination tournament to determine the national champion of men's NCAA Division II college basketball as a culmination of the 1990-91 NCAA Division II men's basketball season. It was won by the University of North Alabama and Bridgeport's Lambert Shell was the Most Outstanding Player.

Regional participants
* denotes tie

New England - Worcester, Massachusetts
Location: Andrew Laska Gymnasium Host: Assumption College


 * Third Place - Merrimack 89, Assumption 71

East - Slippery Rock, Pennsylvania
Location: Morrow Field House Host: Slippery Rock University of Pennsylvania


 * Third Place - Slippery Rock 119, Shippensburg 101

South Central - Warrensburg, Missouri
Location: CMSU Fieldhouse Host: Central Missouri State University


 * Third Place - Kentucky Wesleyan 91, West Texas State 78

West - Bakersfield, California
Location: CSUB Student Activities Center Host: California State University, Bakersfield


 * Third Place - UC Riverside 90, Chico State 82

North Central - Grand Forks, North Dakota
Location: Hyslop Sports Center Host: University of North Dakota


 * Third Place - Metro State 99, Nebraska–Kearney 92

South Atlantic - Charlotte, North Carolina
Location: Brayboy Gymnasium Host: Johnson C. Smith University


 * Third Place - Johnson C. Smith 102, Morehouse 89

South - Troy, Alabama
Location: Sartain Hall Host: Troy State University


 * Third Place - Hampton 70, Florida Southern 68

Great Lakes - Ashland, Ohio
Location: Kates Gymnasium Host: Ashland University


 * Third Place - Bellarmine 94, Missouri Western State 83

* denotes each overtime played

Elite Eight - Springfield, Massachusetts
Location: Springfield Civic Center Hosts: American International College and Springfield College

* denotes each overtime played

All-tournament team

 * Pat Morris (Bridgeport)
 * Lambert Shell (Bridgeport)
 * Fred Stafford (North Alabama)
 * Allen Williams (North Alabama)
 * Carl Wilmer (North Alabama)