Socialist Republic of Vietnam Cộng hòa xã hội chủ nghĩa Việt Nam (Vietnamese) Flag Emblem Motto: Độc lập -- Tự do -- Hạnh phúc "Independence -- Freedom -- Happiness '' Anthem: Tiến Quân Ca (English: "Army March '') Location of Vietnam (green) in ASEAN (dark grey) -- (Legend) Capital Hanoi 21 ° 2 ′ N 105 ° 51 ′ E ﻿ / ﻿ 21.033 ° N 105.850 ° E ﻿ / 21.033; 105.850 Largest city Ho Chi Minh City Official language and national language Vietnamese Ethnic groups 85.7 % Vietnamese 53 minorities (show) 1.9 % Tay 1.8 % Tai 1.5 % Mường 1.5 % Khmer 1.2 % Hmong 1.1 % Nùng 1 % Hoa 4.3 % Others Religion 73.2 % Folk or Irreligious 12.2 % Buddhism 8.3 % Christianity 4.8 % Caodaism 1.4 % Hoahaoism 0.1 % Other religions Demonym Vietnamese Government Marxist - Leninist one - party socialist republic General Secretary Nguyễn Phú Trọng President Trần Đại Quang Prime Minister Nguyễn Xuân Phúc Chairwoman of National Assembly Nguyễn Thị Kim Ngân Legislature National Assembly Formation Independence from France 2 September 1945 Geneva Accords 21 July 1954 Reunification 2 July 1976 Admitted to the United Nations 20 September 1977 ASEAN Declaration 28 July 1995 Current constitution 28 November 2013 Area Total 331,230.8 km (127,888.9 sq mi) (65th) Water (%) 6.4 Population 2016 estimate 94,569,072 (14th) Density 276.03 / km (714.9 / sq mi) (46th) GDP (PPP) 2017 estimate Total $648.243 billion (35th) Per capita $6,925 (128th) GDP (nominal) 2017 estimate Total $215.829 billion (47th) Per capita $2,305 (129th) Gini (2014) 37.6 medium HDI (2015) 0.683 medium 115th Currency đồng (₫) (VND) Time zone (UTC + 7) Date format dd / mm / yyyy Drives on the right Calling code + 84 ISO 3166 code VN Internet TLD. vn
when did north vietnam unify with the south
2 July 1976