Michael O'Connor may refer to:
Politicians 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
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) (1903–1980), Australian rugby league player Michael O'Connor (swimmer) (born 1984), from Bermuda Michael O'Connor (water polo) (1900–1957), Irish water polo player
Others Michael O'Connor (artist) (1801–1867), Irish stained glass artist 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) (1942–2025), 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