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 (born 1941), American politician of the Ohio Democratic party Mary Boyle O'Reilly (1873–1939), American social reformer, clubwoman, and journalist Mary Boyle (born 1970), six-year-old girl who went missing in County Donegal, Ireland in 1977