| Site of Special Scientific Interest | |
 Cliffs on the western side of the SSSI | |
  Location within Southwest Cornwall | |
| Location | Cornwall |
|---|---|
| Grid reference | SW720140 |
| Coordinates | 49°58′58″N 5°10′51″W / 49.9829°N 5.1809°W |
| Interest | Biological/Geological |
| Area | 141.1 hectares (1.411 km2; 0.5448 sq mi) |
| Notification | 1951 |
| Natural England website | |
Caerthillian to Kennack is a coastal Site of Special Scientific Interest (SSSI) on the Lizard Peninsula in Cornwall, UK, noted for both its biological and geological characteristics. It is of great botanical importance, with several Red Data Book of rare and endangered plant species being found on the site, as well as a breeding site for Cornish choughs.