Daniel O. Hastings (1874–1966) was a U.S. Senator from Delaware from 1928 to 1937. Senator Hastings may also refer to:
Clifford C. Hastings (1882–1946), New York State Senate David Hastings (politician) (2000s–2010s), Maine State Senate F. W. Hastings (1848–1935), Washington State Senate Fred W. Hastings (1882–1932), Washington State Senate Frederick H. Hastings (1818–1869, New York State Senate James F. Hastings (1926–2014), New York State Senate Jay Hastings (1878–1939), Nebraska State Senate John A. Hastings (1900–1964), New York State Senate Michael Hastings (politician) (born 1980), Illinois State Senate Seth Hastings (1762–1831), Massachusetts State Senate Thomas N. Hastings (1858–1907), New Hampshire Senate William Soden Hastings (1798–1842), Massachusetts State Senate