William Henry McMaster | |
|---|---|
 | |
| United States Senator from South Dakota | |
| In office March 4, 1925 – March 3, 1931 | |
| Preceded by | Thomas Sterling |
| Succeeded by | William J. Bulow |
| 10th Governor of South Dakota | |
| In office January 4, 1921 – January 6, 1925 | |
| Lieutenant | Carl Gunderson |
| Preceded by | Peter Norbeck |
| Succeeded by | Carl Gunderson |
| 12th Lieutenant Governor of South Dakota | |
| In office January 2, 1917 – January 4, 1921 | |
| Governor | Peter Norbeck |
| Preceded by | Peter Norbeck |
| Succeeded by | Carl Gunderson |
| Member of the South Dakota Senate | |
| In office 1913–1916 | |
| Member of the South Dakota House of Representatives | |
| In office 1911–1912 | |
| Personal details | |
| Born | May 10, 1877 Ticonic, Iowa, U.S. |
| Died | September 14, 1968 (aged 91) Dixon, Illinois, U.S. |
| Political party | Republican |
| Spouse | Harriet Russell |
| Alma mater | Beloit College |
| Profession | Banker |
William Henry McMaster (May 10, 1877 – September 14, 1968) was an American politician who served as the tenth Governor of South Dakota from 1921 until 1925. A member of the Republican Party, he went on to serve as a member of the United States Senate from South Dakota from 1925 to 1931.