Samuel Dexter Hastings (July 24, 1816 – March 26, 1903) was an American activist and reformer.
Born in Leicester, Massachusetts, he moved to Philadelphia, Pennsylvania, where he took part in the anti-slavery movement. In 1846, he moved to Wisconsin settling in Geneva, Wisconsin and then in La Crosse, Wisconsin and Trempealeau, Wisconsin. He served in the Wisconsin State Assembly 1849 and 1857. He served as Wisconsin State Treasurer 1858–1866. Later, he was involved with the temperance movement. He died in Evanston, Illinois.[1]