The 1998 NCAA Division I softball tournament was the seventeenth annual tournament to determine the national champion of NCAA women's collegiate softball.
Held during May 1998, thirty-two Division I college softball teams contested the championship.
The tournament featured eight regionals of four teams, each in a double elimination format.
Fresno State won their first NCAA championship by defeating Arizona 1–0 in the final game.
Fresno State pitcher Amanda Scott was named Women's College World Series Most Outstanding Player.