Mary Montagu

Mary Montagu may refer to:


 * Lady Mary Faith Montagu (1911–1983), daughter of the 9th Earl of Sandwich
 * Lady Mary Wortley Montagu (1689–1762), English writer
 * Mary Montagu, Duchess of Montagu (1689–1751), formerly Lady Mary Churchill, wife of John Montagu, 2nd Duke of Montagu
 * Mary Montagu, Duchess of Montagu (1711–1775), daughter of the above, wife of George Brudenelllater Montagu, 4th Earl of Cardigan, and later Duchess of Montagu
 * Mary Stuart, Countess of Bute (1718–1794), wife of John Stuart, 3rd Earl Stuart