Dazhou Island

Coordinates18°40′31″N 110°28′51″E / 18.675357°N 110.480881°E / 18.675357; 110.480881

Archipelagoarchipelago

Total islands2

Highestelevation289 m (948 ft)

Dazhou Island, Tinhosa Island

Interactive map of Dazhou Island, Tinhosa Island
Geography
Coordinates	18°40′31″N 110°28′51″E / 18.675357°N 110.480881°E / 18.675357; 110.480881
Archipelago	archipelago
Total islands	2
Highest elevation	289 m (948 ft)
Administration
China
Province	Hainan
Demographics
Population	0 (2026)
Pop. density	0/km2 (0/sq mi)no population
Ethnic groups	N\A

Dazhou Island (commonly known as Grand Island or Tinhosa Island) is a state-level nature reserve located about 5 km off the coast of Wanning, Hainan, China. This protected area covers 4.36 square kilometres, and comprises three mountains spanning two islands. These mountains, the tallest of which is 289 metres above sea level, have been used as navigational markers by mariners since the Tang dynasty.^[1]