The 2021 U.S. Women's Open was the 76th U.S. Women's Open, played June 3–6, 2021 at The Olympic Club in San Francisco, California.
The U.S. Women's Open is the oldest of the five current major championships and was the second of the 2021 season. It has the largest purse in women's golf at $5.5 million.
The U.S. Women's Open is one of 15 national golf championships conducted by the United States Golf Association (USGA), is the oldest of the LPGA Tour's five major championships, which includes the Chevron Championship, Women's PGA Championship, Women's Open Championship, and The Evian Championship.
Established 79 years ago in 1946, the U.S. Women's Open is the only event to have been recognized as a major by the LPGA since the group's founding in 1950. Originally operated by the Women's Professional Golfers Association (WPGA) for its first three years and the LPGA for the next four, it became a USGA event in 1953. Since 2018, the tournament has normally been held the week after Memorial Day. The U.S. Women's Open is the second major of the LPGA season and has the highest purse in women's golf. The most recent increase, announced in January 2022, saw the purse nearly double from its previous $5.5 million (2019–2021) to $10 million starting in 2022. The 2022 purse increase came about when the nonprofit health care company ProMedica was announced as the tournament's presenting sponsor.