Mary O'Sullivan may refer to:
- Mary Blanche O'Sullivan (1860–?), Canadian teacher, writer, and editor
- Mary Josephine Donovan O'Sullivan (1887–1966), Irish professor of history
- Mary Kenney O'Sullivan (1864–1943), American organizer in the early U.S. labor movement
- Mary O'Sullivan (camogie), Irish camogie-player
- Mary Rhys-Jones (née O'Sullivan) (born 1965), British charity worker and secretary, mother of Sophie, Countess of Wessex
Topics referred to by the same termThis disambiguation page lists articles about people with the same name. If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: