Mary Boyle may refer to:Mary Boyle (psychologist), British clinical psychologist Mary Boyle, Countess of Cork and Orrery (1746–1840), British literary hostess Mary O. Boyle, American politician of the Ohio Democratic party Mary Boyle O'Reilly (1873–1939), American social reformer, clubwoman, and journalist Mary Boyle, six-year-old girl who went missing in County Donegal, Ireland in 1977