Wanning is a county-level city under the administration of Hainan Province, sitting on the southeast coast of Hainan Island, between Haikou and Sanya. It borders Qionzhong to the west, Lingshui to the south, and Qionghai to the north, with the South China Sea to its east.
Land area: 1,904.17 km²; sea area: 2,783 km²
Total coastline: 195.49 km, including over 10 bays, 2 lagoons, 2 peninsulas and 58 uninhabited islets
Climate: Tropical maritime monsoon climate, average annual temperature 24.8°C, warm all year round
Population: Permanent residents around 558,600 (end of 2025)