Vietnam (Vietnamese: Việt Nam, [vîət nāːm]), officially the Socialist Republic of Vietnam (Vietnamese: Cộng hòa Xã hội chủ nghĩa Việt Nam), is a country in Southeast Asia and the easternmost country on the Indochinese Peninsula. With an estimated 96.2 million inhabitants as of 2019, it is the 15th most populous country in the world. Vietnam shares its land borders with China to the north, and Laos and Cambodia to the west. It shares its maritime borders with Thailand through the Gulf of Thailand, and the Philippines, Indonesia and Malaysia through the South China Sea. Its capital city is Hanoi, and its most populous city is Ho Chi Minh City, also known by its former name of Saigon.
Hanoi (UK: /(ˌ)hæ-, həˈnɔɪ/ ha-, hə-NOY or US: /hɑː-/ hah-NOY; Vietnamese: Hà Nội [hàː nôjˀ]) is the capital city of Vietnam. It covers an area of 3,358.6 km2 (1,296.8 sq mi). It is the second largest city in Vietnam, with over eight million residents within the city proper and an estimated population of 20 million within the metropolitan area. Located in part of the Red River Delta, Hanoi is the commercial, cultural, and educational centre of Northern Vietnam. Having an estimated nominal GDP of US$32.8 billion as of 2018, it is the second most productive economic area of Vietnam, after Ho Chi Minh City.