The 2003 NCAA Division I Softball Tournament was the twenty-second annual tournament to determine the national champion of NCAA women's collegiate softball. Held during May 2003, 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 2003 Women's College World Series was held in Oklahoma City, Oklahoma from May 22 through May 25 and marked the conclusion of the 2003 NCAA Division I softball season. UCLA won their tenth NCAA championship and eleventh overall by defeating California 1–0 in the final game. UCLA pitcher was named Women's College World Series Most Outstanding Player.