Mary Grant Price (20 February 1917 – 2 March 2002) was a Welsh-American costume designer who worked in theatre and film.
She began her career on Broadway in the mid-1930s, first as an assistant to Raoul Pene Du Bois, and later as a lead designer during the 1940s.
Price was born Eleanor Mary Grant in Broad Haven, Pembrokeshire, Wales.
She worked with these two men on several notable Broadway shows, including the original productions of DuBarry Was a Lady (1939), Sons o' Fun (1941), and Oklahoma!
Between 1943–1972, Grant designed costumes for 14 motion pictures, beginning with Follies Girl which was released in 1943.