The 2004 NCAA Division I Softball Tournament was the twenty-third annual tournament to determine the national champion of NCAA women's collegiate softball. Held during May 2004, sixty-four Division I college softball teams contested the championship. The tournament featured eight regionals of eight teams, each in a double elimination format. The 2004 Women's College World Series was held in Oklahoma City, Oklahoma from May 27 through May 31 and marked the conclusion of the 2004 NCAA Division I softball season. UCLA won their eleventh NCAA championship and twelfth overall by defeating California 3–1 in the final game. LSU pitcher was named Women's College World Series Most Outstanding Player.