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

William Sprague, also known as William III or William Sprague III, 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.

The governor of Rhode Island is the head of government of Rhode Island and serves as commander-in-chief of the U.S. state's Army National Guard and Air National Guard. The current governor is Dan McKee.