William Sprague III, American lawyer and politician, 14th Governor of Rhode Island (d. 1856)

William Sprague, also known as William III or William Sprague III (November 3, 1799 – October 19, 1856), was a politician and industrialist from the U.S. state of Rhode Island, serving as the 14th Governor, a U.S. Representative and a U.S. Senator. He was the uncle of William Sprague IV, also a Governor and Senator from Rhode Island.