1991 NCAA Division III 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, who defeated for the championship.