|  | Location: Southeastern Asia, bordering the Gulf of Thailand, Gulf of Tonkin, and South China Sea, alongside China, Laos, and Cambodia Area: land: 325,360 sq km, water: 4,200 sq km Climate: tropical in south; monsoonal in north with hot, rainy season (mid-May - mid-Sept) and warm, dry season (mid-Oct - mid-March) Terrain: low, flat delta in south and north; central highlands; hilly, mountainous in far north and northwest Population: 81,624,716 (July 2003 est.) Ethnic groups: Vietnamese 85%-90%, Chinese, Hmong, Thai, Khmer, Cham, mountain groups Religions: Buddhist, Hoa Hao, Cao Dai, Christian (predominantly Roman Catholic, some Protestant), indigenous beliefs, Muslim Languages: Vietnamese (official), English (increasingly favored as a 2nd language), some French, Chinese, and Khmer; mountain area languages (Mon-Khmer and Malayo-Polynesian) Currency: dong (VND) |