Mary O'Neill may refer to:
- Marykate O'Neil (born 1968), American indiepop singer-songwriter
- Mary O'Neill (Canadian politician) (born 1941), Canadian member of the Legislative Assembly of Alberta
- Mary Devenport O'Neill (1879–1967), American poet
- Mary O'Neill (fencer) (born 1965), American Olympic fencer
- Mary-Anne O'Neill (born 1955), Australian politician
See also
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: