The United States Women's Open, a.k.a. U.S. Women's Open or Women's U.S. Open, is an annual tournament for women, dedicated to ten-pin bowling in the United States. From its inception in 1949 until its cancellation in 2004, after the Professional Women's Bowling Association (PWBA) folded, the event was held every year except for 1953, 1997 and 2002. From 1949 through 1970, the tournament was known as the Bowling Proprietors' Association of America (BPAA) Women's All-Star. From 1971 on, it became known as the U.S. Women's Open.