Native name: Tanö Niha | |
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| Geography | |
| Location | South East Asia |
| Coordinates | 1°6′N 97°32′E / 1.100°N 97.533°E |
| Area | 4,372.17 km2 (1,688.10 sq mi) |
| Highest elevation | 2,815 ft (858 m) |
| Highest point | Lölömatua |
| Administration | |
Indonesia | |
| Province | North Sumatra |
| Regencies | Nias, South Nias, North Nias, West Nias |
| Largest settlement | Gunungsitoli (pop. 142,890) |
| Demographics | |
| Population | 895,533 (mid 2023 estimate) |
| Pop. density | 204.83/km2 (530.51/sq mi) |
| Ethnic groups | Predominantly Nias Others: Batak, Minang, Aceh and Chinese |
Nias (Indonesian: Pulau Nias, Nias: Tanö Niha) is an island located off the western coast of Sumatra, Indonesia. Nias is also the name of the archipelago (Kepulauan Nias) of which the island is the centre, but also includes the Batu Islands to the southeast and the small Hinako Islands to the west.