The U.S. Women's Open Championship is an open chess tournament that has been held irregularly. From 1934 through at least 1966 it was held in conjunction with the annual U.S. Open Chess Championship. After some years of inactivity, the event was reinstituted in 2009.
From 1934 through 1950 and in 1954, the women's tournaments were held as a round-robin tournament in conjunction with the U.S. Open. From 1951 through at least 1966, with the exception of 1954, the women played in the U.S. Open with the title U.S. Women's Open Champion being awarded to the woman with the highest score.
The title was not awarded for some time. In 2009 the event was held again, with sixteen players in a six-round tournament, but not in conjunction with the U.S. Open. It was held in conjunction with the U.S. Senior Chess Championship and two other tournaments. Chess Life incorrectly called it the first U.S. Women's Open Championship. The highest-placing US citizen qualifies for the U.S. Women's Chess Championship.
Complete records of the Women's Open Championship are not available.
|1||1934||Chicago, Illinois||Virginia Sheffield|
|2||1937||Chicago, Illinois||Jean M. Grau|
|3||1938||Boston, Massachusetts||Mona May Karff|
|4||1939||New York, New York||Mona May Karff|
|5||1948||Baltimore, Maryland||Mona May Karff|
|6||1950||Detroit, Michigan||Mona May Karff and Lucille Kellner|
|7||1951||Fort Worth, Texas||Maxine Cutlip|
|8||1953||Milwaukee, Wisconsin||Eva Aronson|
|9||1954||New Orleans, Louisiana||Gisela Kahn Gresser|
|10||1955||Long Beach, California||Sonja Graf|
|11||1956||Oklahoma City, Oklahoma||Sonja Graf|
|12||1957||Cleveland, Ohio||Sonja Graf|
|13||1958||Rochester, Minnesota||Kathryn Slater|
|14||1959||Omaha, Nebraska||Sonja Graf|
|15||1960||St. Louis, Missouri||Lisa Lane|
|16||1961||San Francisco, California||Eva Aronson|
|17||1962||San Antonio, Texas||Kathryn Slater|
|18||1963||Chicago, Illinois||Kate Sillars|
|19||1964||Boston, Massachusetts||Kathryn Slater and Cecilia Rock|
|20||1965||Rio Piedras, Puerto Rico||Mary Bain and Kathryn Slater|
|21||1966||Seattle, Washington||Mary Bain|
|22||1969||Lincoln Nebraska||Eva Aronson|
|23||1972||St. Petersburg, Florida||Eva Aronson and Marilyn Braun|
|24||1973||Chicago, Illinois||Eva Aronson|
|25||2009||Tulsa, Oklahoma||Saheli Nath (WFM)|