- Source: 1991 NCAA Division III baseball tournament
- 1991 NCAA Division III baseball tournament
- NCAA Division III baseball tournament
- 1991 NCAA Division I baseball tournament
- 2023 NCAA Division I baseball tournament
- 1991 NCAA Division II baseball tournament
- 1983 NCAA Division I baseball tournament
- NCAA Division II baseball tournament
- NCAA Division I baseball tournament
- 1992 NCAA Division III baseball tournament
- 2004 NCAA Division I baseball tournament
The 1991 NCAA Division III baseball tournament was played at the end of the 1991 NCAA Division III baseball season to determine the 16th national champion of college baseball at the NCAA Division III level. The tournament concluded with eight teams competing at C. O. Brown Stadium in Battle Creek, Michigan, for the championship. Eight regional tournaments were held to determine the participants in the World Series. Regional tournaments were contested in double-elimination format, with one region consisting of six teams, six regions consisting of four teams, and one region consisting of two teams, which was played as best-of-five, for a total of 32 teams participating in the tournament, up from 24 in 1990. The tournament champion was Southern Maine, who defeated Trenton State for the championship.
See also
1991 NCAA Division I baseball tournament
1991 NCAA Division II baseball tournament
1991 NAIA World Series