Senator O'Connor may refer to:
Edmund O'Connor (1848–1898), New York State Senate Edward T. O'Connor Jr. (born 1942), New Jersey State Senate Frank D. O'Connor (1909–1992), New York State Senate Frank Patrick O'Connor (1885–1939), State Senate of Canada Senator O'Connor College School, named for Frank Patrick O'Connor Michael J. O'Connor (politician) (1928–2018), South Dakota State Senate Patrick O'Connor (Massachusetts politician) (born 1984), Massachusetts State Senate Sandra Day O'Connor (born 1930), Arizona State Senate
See also Herbert O'Conor (1896–1960), U.S. Senator from Maryland from 1947 to 1953