Bill O'Hara

Bill O'Hara may refer to:


 * Bill O'Hara (baseball) (1883–1931), American Major League Baseball outfielder
 * Bill O'Hara (footballer, born 1879) (1879–1957), Australian rules footballer for St Kilda
 * Bill O'Hara (footballer, born 1880) (1880–1946), Australian rules footballer for South Melbourne
 * Bill O'Hara (sailor) (born 1958), Irish Olympic sailor