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.

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

 * Long Beach State qualifies for WCWS, 2–1

First elimination round

 * 2, 1
 * 2, San Jose State 1
 * UNLV 1, California 0

Second elimination round

 * UNLV qualifies for WCWS, 3–1

First elimination round

 * 1, 0 (20 innings)
 * 5, Connecticut 0
 * Oklahoma State 1, Adelphi 0

Second elimination round

 * Oklahoma State qualifies for WCWS, 3–0

First elimination round

 * 5, 0
 * 1, Texas A&M 0
 * Florida State 4, Southwestern Louisiana 3

Second elimination round

 * Florida State qualifies for WCWS, 3–0

First elimination round

 * 4, 0
 * Ohio State 2, 0
 * Kent State 3, Oregon 0

Second elimination round

 * Kent State qualifies for WCWS, 3–0

Participants

 * Fresno State
 * UCLA
 * Fresno State
 * UCLA
 * UCLA
 * UCLA
 * UCLA

All-Tournament Team
The following players were named to the All-Tournament Team