Bastøy
Location in Vestfold | |
| Geography | |
|---|---|
| Location | Vestfold, Norway |
| Coordinates | 59°22′48.55″N 10°31′29.65″E / 59.3801528°N 10.5249028°E |
| Area | 2.23 km2 (0.86 sq mi) |
| Length | 3 km (1.9 mi) |
| Width | 1.5 km (0.93 mi) |
| County | Vestfold |
| Municipality | Horten |
| Demographics | |
| Population | 0 (2024) |
Bastøy is an island in Horten Municipality in Vestfold county, Norway. The 2.23-square-kilometre (550-acre) island is owned by the government and it has no permanent residents, however, Bastøy Prison, a minimum-security prison, is located on the island, so there are always temporary residents on the island. The Bastøy Lighthouse was established on the island in 1840.