Michael O'Connor may refer to:
Politicians
Sportsmen
- 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
- Mick O'Connor (rugby league) (1903âÂÂ1980), Australian rugby league player
- Michael O'Connor (swimmer) (born 1984), from Bermuda
- Michael O'Connor (water polo) (1900âÂÂ1957), Irish water polo player
Others
- Michael O'Connor (artist) (1801âÂÂ1867), Irish stained glass artist
- Michael O'Connor (American bishop) (1810âÂÂ1872), Catholic bishop of Pittsburgh, U.S.A.
- Michael O'Connor (Australian bishop) (1829âÂÂ1883), Roman Catholic bishop of Ballarat
- Michael O'Connor (costume designer) (born 1965), English costume designer
- Michael O'Connor (priest) (1942âÂÂ2025), 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) (1938âÂÂ1992), American animator for The Simpsons
- Michael P. O'Connor (writer) (1896âÂÂ1967), Irish doctor, writer and radio broadcaster
- Michael Patrick O'Connor (1950âÂÂ2007), American linguist
- Michael O'Connor (centenarian) (1913âÂÂ2022), Irish centenarian
- Mike O'Connor (journalist) (1946âÂÂ2013), American journalist and correspondent for Mexico