The 2018 U.S. Women's Open was the 73rd U.S. Women's Open, played May 31 – June 3 at Shoal Creek Club in Shoal Creek, Alabama, a suburb southeast of Birmingham. The U.S. Women's Open is the oldest of the five current major championships and the second of the 2018 season. It has the largest purse in women's golf at $5 million. The tournament was televised by Fox Sports 1 and Fox Sports. Ariya Jutanugarn won the championship in a playoff over Kim Hyo-joo, which ended on the fourth extra hole.