1991 NCAA Division II baseball tournament

The 1991 NCAA Division II baseball tournament was the postseason tournament hosted by the NCAA to determine the national champion of baseball among its Division II colleges and universities at the end of the 1991 NCAA Division II baseball season.

The final, eight-team double-elimination tournament was played at Paterson Field in Montgomery, Alabama.

Defending champions Jacksonville State defeated Missouri Southern State, 20–4, in the championship game, claiming the Gamecocks' second Division II national title.