1990 NCAA Division I softball tournament
The 1990 NCAA Division I softball tournament was the ninth annual tournament to determine the national champion of NCAA women's collegiate softball. Held during May 1990, twenty Division I college softball teams contested the championship. The tournament featured eight regionals of either two or three teams, each in a double elimination format. The 1990 Women's College World Series was held in Oklahoma City, Oklahoma from May 23 through May 28 and marked the conclusion of the 1990 NCAA Division I softball season. For the third consecutive year, UCLA won the championship by defeating Fresno State 2–0 in the final game.
Regionals
Regional No. 1
- UCLA qualifies for WCWS, 2–0
Regional No. 2
- Fresno State qualifies for WCWS, 2–0
Regional No. 3
- Arizona qualifies for WCWS, 2–1
Regional No. 4
Regional No. 5
Second elimination round
- UNLV qualifies for WCWS, 3–1
Regional No. 6
First elimination round
- 1, 0
- 5, Connecticut 0
- Oklahoma State 1, Adelphi 0
Second elimination round
Regional No. 7
First elimination round
Second elimination round
Regional No. 8
First elimination round
- 4, 0
- Ohio State 2, 0
- Kent State 3, Oregon 0
Second elimination round
Participants
Game results
Bracket
Championship Game
All-Tournament Team
The following players were named to the All-Tournament Team
| Pos | Name | School |
| P | Lisa Longaker | UCLA |
| P | Marcie Green | Fresno State |
| 1B | Kerry Dienelt | UCLA |
| 2B | Dawn Lange | Oklahoma State |
| 3B | Lisa Fernandez | UCLA |
| SS | Martha Noffsinger | Fresno State |
| OF | Shanna Flynn | UCLA |
| OF | Yvonne Gutierrez | UCLA |
| OF | Leslie Barton | Florida State |
| C | Shannon Kimberling | Oklahoma State |
| AL | Julie Smith | Fresno State |
| AL | Debbie DeJohn | Florida State |