| William Clarence Moulton | |
| Office: | Member of the Massachusetts Senate Berkshire District |
| Term Start: | 1920 |
| Term End: | 1922 |
| Successor: | William A. O'Hearn |
| Term Start4: | 1917 |
| Term End4: | 1919 |
| Office5: | Member of the Pittsfield, Massachusetts Board of Aldermen |
| Term Start5: | 1913 |
| Term End5: | 1914 |
| Office6: | Member of the Pittsfield, Massachusetts Common Council |
| Term Start6: | 1911 |
| Term End6: | 1912 |
| Birth Date: | October 15, 1873 |
| Death Date: | December 14, 1927 (aged 54) |
| Death Place: | Pittsfield, Massachusetts |
| Profession: | Insurance |
William Clarence Moulton (October 15, 1873 – December 14, 1927) was an American politician who served as a member of the Massachusetts Senate, as well as a member of the Common Council, Board of Aldermen and Mayor of Pittsfield, Massachusetts.