Peninnis Head
| Site of Special Scientific Interest | |
Penninnis Head with lighthouse | |
| Location | Cornwall |
|---|---|
| Grid reference | SV911094 |
| Coordinates | 49°54′19″N 6°18′10″W / 49.9053°N 6.3029°W |
| Interest | Biological and Geological |
| Area | 16.1 hectares (0.161 km2; 0.0622 sq mi) |
| Notification | 1971 |
| Natural England website | |
Peninnis Head (Cornish: Penn Enys, meaning island head) is the southernmost point of St Mary's, Isles of Scilly. The headland is within the Isles of Scilly Area of Outstanding Natural Beauty and part of the Heritage Coast. It is also a Geological Conservation Review site for its Quaternary geomorphology and was first designated a Site of Special Scientific Interest (SSSI) in 1971 for both its biological and geological interests. All of the land designated as Peninnis Head SSSI is owned by the Duchy of Cornwall. On the tip of the headland is a squat lighthouse built in 1911 by Trinity House as a replacement for the 17th century lighthouse on St Agnes.
The Gilstone, a prominent rock off the eastern side of Peninnis Head, should not be confused with a rock of the same name in the Western Rocks.