The 1991 NCAA Division III men's basketball tournament was the 17th annual single-elimination tournament to determine the national champions of National Collegiate Athletic Association (NCAA) men's Division III collegiate basketball in the United States.

Held during March 1991, the field included forty teams. The championship rounds were contested in Springfield, Ohio.

Wisconsin–Platteville (28–3) defeated Franklin & Marshall, 81–74, to clinch their first NCAA Division III national title.

Bracket Top left sectional

Bottom left sectional

Top right sectional

Bottom right sectional

National finals Site: Springfield, Ohio

All-tournament team Shawn Frison, Wisconsin–Platteville James Bradley, Otterbein Robby Jeter, Wisconsin–Platteville Will Lasky, Franklin & Marshall David Wilding, Franklin & Marshall

See also 1991 NCAA Division I men's basketball tournament 1991 NCAA Division II men's basketball tournament 1991 NCAA Division III women's basketball tournament 1991 NAIA Division I men's basketball tournament

References