1991 NCAA Division I softball tournament

The 1991 NCAA Division I softball tournament was the tenth annual tournament to determine the national champion of NCAA women's collegiate softball. Held during May 1991, 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 1991 Women's College World Series was held in Oklahoma City, Oklahoma from May 23 through May 26 and marked the conclusion of the 1991 NCAA Division I softball season. Arizona won their first championship by defeating three-time defending champions UCLA 5–1 in the final game.

First elimination round

 * 1, 0
 * 3, Southwestern Louisiana 2
 * Florida State 2, Oklahoma State 0

Second elimination round

 * Florida State qualifies for WCWS, 3–0

Regional No. 2

 * UCLA qualifies for WCWS, 2–0

First elimination round

 * 3, 1
 * 3, Connecticut 0
 * UNLV 4, UMass 0

Second elimination round

 * UNLV qualifies for WCWS, 3–0

Regional No. 4

 * Arizona qualifies for WCWS, 2–0

Regional No. 5

 * Long Beach State qualifies for WCWS, 2–1

First elimination round

 * 2, 0
 * 2, Southern Illinois 0
 * Missouri 2, Iowa 0

Second elimination round

 * Missouri qualifies for WCWS, 3–0

Regional No. 7

 * Fresno State qualifies for WCWS, 2–0

First elimination round

 * 1, 0
 * Minnesota 3,
 * Texas A&M 1, Utah 0
 * Utah 2, Minnesota 0

Second elimination round

 * Utah qualifies for WCWS, 3–1

Participants

 * Arizona
 * UCLA
 * UCLA
 * UCLA
 * UCLA
 * UCLA

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