John Thornton (1846–1917) was a U.S. Senator from Louisiana from 1910 to 1915. Senator Thornton may also refer to:
Ant Thornton (fl. 2020s), New Mexico State Senate Daniel I. J. Thornton (1911–1976), Colorado State Senate David F. Thornton (1924–2008), Virginia State Senate Harry I. Thornton (1834–1895), California State Senate J. Lyndon Thornton (1886–1953), Nebraska State Senate John R. Thornton (Arkansas politician) (1840–1910), Arkansas State Senate R. Ewell Thornton (1865–1928), Virginia State Senate William L. Thornton (1844–1915), New York State Senate