Ruth Williams may refer to:Ruth Williams (baseball) (1926–2005), baseball pitcher Ruth J. Williams, Australian-American mathematician Ruth Williams (badminton), Jamaican badminton player Ruth C. Williams (1897–1962), Australian writer for children Ruth Margaret Williams, British mathematician Ruth Cupp (1928–2016), née Williams, American lawyer and legislator Ruth Williams Khama (1923–2002), First Lady of Botswana from 1966 to 1980 Ruth Williams-Simpson, Jamaican sprinter Ruth Williams, character in 1940 American film noir Babies for Sale