In 1991, Hamm was named to the roster for the inaugural FIFA Women's World Cup in China under North Carolina coach Anson Dorrance. At 19 years old, she was still the youngest player on the team. During the team's first match of the tournament, Hamm scored the game-winning goal in the 62nd minute, leading the U.S. to a 3–2 win over Sweden. She also scored once in their second group stage match when they defeated Brazil 5–0. The U.S. squad finished first in Group B after a third win against Japan on November 21 and advanced to the knockout stage of the tournament. During the quarterfinal match, the U. S. defeated Chinese Taipei 7–0. After defeating Germany 5–2 during the semi-final, the U.S. faced Norway in the final. In front of 63,000 spectators, the U.S. clinched the first World Cup championship title after a 2–1 win.