The 1990 NCAA Division III baseball tournament was played at the end of the 1990 NCAA Division III baseball season to determine the 15th national champion of college baseball at the NCAA Division III level.
The tournament concluded with six teams competing at a new location at C. O.
Brown Stadium in Battle Creek, Michigan, for the championship.
Six regional tournaments were held to determine the participants in the World Series.
The tournament champion was Eastern Connecticut State, who defeated Aurora for the championship.