Mary Dorothy Kirby (January 15, 1920 – December 12, 2000) was an American professional golfer and sportscaster.

She was the runner-up to Betty Jameson in 1939 and to Louise Suggs in 1947 then won the most prestigious women's event in 1951.

Attempting to defend her title, in 1952 she had the lowest round of the tournament but was still knocked out early.

Dorothy Kirby was a member of four U.S. Curtis Cup teams (1948, 1950, 1952, 1954), and despite her success as an amateur, she chose not to join the professional LPGA Tour.

Dorothy Kirby retired from competition in the mid-1950s and worked as a radio and television sportscaster and sales representative for thirty-five years.