Michael O'Sullivan

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''