Robert O'Malley may refer to:
Robert Emmett O'Malley (born 1943), United States Marine soldier and Medal of Honor recipient Robert Edmund O'Malley (1939–2020), American mathematician. Robert George O'Malley (1856–1938), Irish-born farmer and political figure in Manitoba Robbie O'Malley (born 1965), Irish Gaelic footballer
See also Robert Malley (born 1963), American lawyer, political scientist and specialist in conflict resolution