Michael O'Sullivan
Michael O'Sullivan may refer to:
Individual
- Michael O'Sullivan (actor), American actor
- Michael O'Sullivan (cricketer), former English cricketer
- Michael O'Sullivan (footballer), former Australian rules footballer
- Michael O'Sullivan (hurler), Irish hurler who played for Cork
- Michael O'Sullivan (jockey), Irish jockey
- Michael O'Sullivan (poet), Irish poet
- Michael O'Sullivan (politician), Lower Canada lawyer, militia officer, politician and judge
- Michael O'Sullivan (soccer), English-American soccer player
- Sir Michael Neil O'Sullivan, Australian politician and lawyer
- Mickey O'Sullivan, Irish retired Gaelic football manager, selector, and former player
Fictional
- Michael O'Sullivan, character in ''Road to Perdition''