Mary Hardy

Mary Hardy may refer to:


 * Mary Hardy (actuary), professor of actuarial science
 * Mary Hardy (diarist) (1733–1809), English brewer's wife and diarist
 * Mary Anne Hardy (c.1825–1891), English novelist and travel writer
 * María Cordero Hardy (born 1932), Puerto Rican scientist whose research has helped in the understanding of the properties of vitamin E
 * Mary Hardy (comedian) (1931–1985), Australian comedian