_#_Land boundaries: 3,818 km total; Cambodia 982 km, China 1,281 km, Laos 1,555 km
_#_Coastline: 3,444 km (excluding islands)
_#_Maritime claims:
Contiguous zone: 24 nm;
Continental shelf: edge of continental margin or 200 nm;
Exclusive economic zone: 200 nm;
Territorial sea: 12 nm
_#_Disputes: offshore islands and three sections of the boundary with Cambodia are in dispute; maritime boundary with Cambodia not defined; occupied Cambodia on 25 December 1978; sporadic border clashes with China; involved in a complex dispute over the Spratly Islands with China, Malaysia, Philippines, and Taiwan; unresolved maritime boundary with Thailand; maritime boundary dispute with China in the Gulf of Tonkin; Paracel Islands occupied by China but claimed by Vietnam and Taiwan; unresolved maritime boundary with Thailand
_#_Climate: tropical in south; monsoonal in north with hot, rainy season (mid-May to mid-September) and warm, dry season (mid-October to mid-March)
_#_Terrain: low, flat delta in south and north; central highlands; hilly, mountainous in far north and northwest