Mary Grey may refer to: Mary Caroline Grey, birth name of Mary Elliot-Murray-Kynynmound, Countess of Minto (1858–1940), British aristocrat Mary Grey (theologian) (born 1941), English Roman Catholic ecofeminist liberation theologian Lady Mary Grey (1545–1578), sister of Jane Grey, Queen of England Mary Grey, Countess Grey (1776–1861), wife of Charles Grey, 2nd Earl Grey Mary Grey, Countess of Kent (died 1702), English peeress Mary Grey, Baroness Grey de Wilton Lady Mary Gregory (1719–1769), née Lady Mary Grey, daughter of Henry Grey, 1st Duke of Kent
Fictional characters Mary Grey, in the 1939 American comedy film Fifth Avenue Girl
See also Mary Gray (disambiguation) Mary Gray-Reeves (born 1962), American Episcopal bishop