The 1973 U.S. Women's Open was the 28th U.S. Women's Open, held July 19–22 at the Country Club of Rochester in Rochester, New York. Defending champion Susie Berning won the third of her three U.S. Women's Open titles, five strokes ahead of runners-up Gloria Ehret and Shelley Hamlin. After a three-under 69 in the third round, Berning was the co-leader with Pam Higgins, two strokes ahead of 36-hole leader Sharon Miller. Berning was the third of seven to successfully defend the championship, following Mickey Wright in 1959 and Donna Caponi in 1970; it was the last of her four major titles.