Eugene O'Neill may refer to:
Eugene O'Neill (1888–1953), American playwright Eugene O'Neill Theatre, Broadway theater Eugene O'Neill Theater Center, Connecticut theater Eugene O'Neill Award, Swedish acting award Eugene O'Neill National Historic Site, Danville, California Eugene O'Neill Jr. (1910–1950), professor of Greek literature, son of the playwright Eugene O'Neill (hurler) (born 1978), Irish hurler Eugene M. O'Neill (1850–1926), Irish-born American lawyer and newspaper owner Eugene W. O'Neill Jr. (1919–1998), American Air Force officer and flying ace