Sir John St Aubyn, 3rd Baronet | |
|---|---|
 portrait by John Smibert | |
| Born | 27 September 1696  |
| Died | 15 August 1744 (aged 47) |
| Alma mater | |
| Occupation | Politician |
| Spouse(s) | Catharine Morice |
Sir John St Aubyn, 3rd Baronet (1696–1744), of Clowance and St Michael's Mount, Cornwall, was an English Tory politician who sat in the House of Commons from 1722 to 1744.