William Dickinson Martin (October 20, 1789 – November 17, 1833) was an American politician who served two terms as a U.S. Representative from South Carolina from 1827 to 1831.
Born in Martintown, Edgefield District, South Carolina, Martin pursued an academic course.
He was admitted to the bar in 1811 and commenced practice in Edgefield, South Carolina, the same year.
He served as member of the State house of representatives for St. Luke's Parish 1816–1817.
He served as judge of the circuit courts of law and appeal 1831–1833.