| William Thorndike | |
| Birth Date: | January 22, 1795 |
| Birth Place: | Beverly, Massachusetts |
| Death Date: | July 12, 1835 (aged 40) |
| Death Place: | Beverly, Massachusetts |
| Nationality: | American |
| Office: | 19th President of the Massachusetts Senate |
| Term Start: | 1832 |
| Term End: | 1832 |
| Predecessor: | Leverett Saltonstall |
| Successor: | Benjamin T. Pickman |
| Office2: | Member of the Massachusetts Senate |
| Term Start2: | 1828 |
| Term End2: | 1832 |
| Office3: | Member of the Massachusetts House of Representatives |
| Term Start3: | 1826 |
| Term End3: | 1827 |
| Spouse: | Anna (Nancy) Stephens, m. November 8, 1821 Beverly, Massachusetts |
William Thorndike (January 22, 1795 July 12, 1835) was a Massachusetts lawyer and politician who served in the Massachusetts House of Representatives, and as a member and President of the Massachusetts Senate.