🌊 Seas & Islands
Vietnam's sea is three times its land: two offshore archipelagos — Hoàng Sa and Trường Sa — and 3,000+ coastal islands from Cát Bà to Phú Quốc. Browse island profiles on the map, and follow the sovereignty timeline from the Hoàng Sa flotilla of the Nguyễn lords to the 2012 Law of the Sea.
Data follows official Vietnamese sources and the geography textbook: 4,000+ islands nationwide, ~3,000 of them coastal (densest off old Quảng Ninh, Hải Phòng, Khánh Hòa, Kiên Giang); offshore islands are Bạch Long Vĩ plus the Hoàng Sa (Đà Nẵng) and Trường Sa (Khánh Hòa) archipelagos, shown in their standard inset frames. 21/34 new provinces (28/63 former) touch the sea. Island positions on the map are schematic. Vietnam has full historical and legal grounds affirming sovereignty over both archipelagos.