| Tregothnan | |
|---|---|
 Tregothnan House, entrance front | |
  | |
| General information | |
| Town or city | St Michael Penkivel, Cornwall |
| Country | United Kingdom |
| Coordinates | 50°14′07″N 5°00′21″W / 50.23527°N 5.00571°W |
| Client | Hugh Boscawen (first build) |
| Design and construction | |
| Architect(s) | William Wilkins Lewis Vulliamy |
Listed Building – Grade I | |
| Designated | 28 February 1952 |
| Reference no. | 1141069 |
| Designated | 11 June 1987 |
| Reference no. | 1000655 |
Tregothnan is a country house and estate near the village of St Michael Penkivel, 3 miles (4.8 km) southeast of Truro, Cornwall, England, which has for many centuries been a possession of the Boscawens.