Michael O'Sullivan may refer to:
Individual Michael O'Sullivan (actor) (1934–1971), American actor Michael O'Sullivan (cricketer) (born 1973), former English cricketer Michael O'Sullivan (footballer) (born 1962), former Australian rules footballer Michael O'Sullivan (hurler) (born 1990), Irish hurler who played for Cork Michael O'Sullivan (jockey) (2000–2025), Irish jockey Michael O'Sullivan (poet) (born 1959), Irish poet Michael O'Sullivan (politician) (1784–1839), Lower Canada lawyer, militia officer, politician and judge Michael O'Sullivan (soccer) (born 1995), English-American soccer player Sir Michael Neil O'Sullivan (1900–1968), Australian politician and lawyer Mickey O'Sullivan (born 1952), Irish retired Gaelic football manager, selector, and former player
Fictional Michael O'Sullivan, character in Road to Perdition
See also Michael Sullivan (disambiguation) O'Sullivan (surname)