Senator Hannan or Hannon may refer to:
Beverly Hannon (born 1932), Iowa State Senate George Hannan (1910–2009), Senate of Australia James P. Hannan (1918–1987), Michigan State Senate Joseph Hannan (1875–1943), Senate of Australia Kemp Hannon (born 1946), New York State Senate Lenn Hannon (1943–2010), Oregon State Senate