William Sprague III | |
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| United States Senator from Rhode Island | |
| In office February 18, 1842 – January 17, 1844 | |
| Preceded by | Nathan F. Dixon |
| Succeeded by | John B. Francis |
| 14th Governor of Rhode Island | |
| In office May 2, 1838 – May 2, 1839 | |
| Lieutenant | Joseph Childs |
| Preceded by | John B. Francis |
| Succeeded by | Samuel Ward King |
| Member of the U.S. House of Representatives from Rhode Island's At-large district | |
| In office March 4, 1835 – March 3, 1837 | |
| Preceded by | Tristam Burges |
| Succeeded by | Robert B. Cranston |
| Speaker of the Rhode Island House of Representatives | |
| In office 1832–1835 | |
| Preceded by | Joseph L. Tillinghast |
| Succeeded by | Henry Y. Cranston |
| Personal details | |
| Born | November 3, 1799 Cranston, Rhode Island |
| Died | October 19, 1856 (aged 56) Providence, Rhode Island |
| Political party | Whig |
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.