Michael O'Connor may refer to:

• Michael O'Connor (Australian politician) (1865–1940), Australian politician
• Michael O'Connor (Wisconsin politician) (1856–1925), Wisconsin state assemblyman
• Michael J. O'Connor (politician) (1928–2018), American politician in the state of South Dakota
• Michael P. O'Connor (politician) (1831–1881), U.S. representative

• Michael O'Connor (baseball) (born 1980), Major League Baseball player
• Michael O'Connor (Canadian football) (born 1996), Canadian football quarterback
• Michael O'Connor (footballer, born 1960), Irish association footballer
• Michael O'Connor (footballer, born 1987), Northern Irish footballer for Salford City and Northern Ireland
• Michael O'Connor (footballer, born 1998), Irish association footballer
• Michael O'Connor (hurler) (born 1930), Irish hurler
• Michael O'Connor (rugby) (born 1960), Australian rugby union and rugby league player
• Michael O'Connor (swimmer) (born 1984), from Bermuda
• Michael O'Connor (water polo) (1900–1957), Irish water polo player

• Michael O'Connor (American bishop) (1810–1872), Catholic bishop of Pittsburgh, U.S.A.
• Michael O'Connor (Australian bishop) (1829–1883), Roman Catholic bishop of Ballarat
• Michael O'Connor (costume designer) (born 1965), English costume designer
• Michael O'Connor (priest) (born 1942), dean of Auckland
• Michael O'Connor (union official), national secretary of the Australian Construction, Forestry, Maritime, Mining and Energy Union
• Michael J. O'Connor (animator) (1938–1992), American animator for The Simpsons
• Michael P. O'Connor (writer) (1896–1967), Irish doctor, writer and radio broadcaster
• Michael Patrick O'Connor (1950–2007), American linguist
• Michael O'Connor (centenarian) (1913–2022), Irish centenarian
• Mike O'Connor (journalist) (1946–2013), American journalist and correspondent for Mexico

This disambiguation page lists articles about people with the same name.
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