Ruth Williams-Simpson (born 19 October 1949) is a Jamaican sprinter. She competed in the 400 metres at the 1972, 1976 and the 1980 Summer Olympics. She won a bronze medal in the 4 x 400 metres relay at the 1971 Pan American Games.
Williams-Simpson competed for the Texas Woman's Pioneers track and field team, finishing runner-up in the 300 m at the 1980 AIAW Indoor Track and Field Championships.