Vietnam is a country located in South East Asia, bordering the South China Sea to the east, Laos and Cambodia to the west, the Gulf of Thailand to the south, and China to the north. With an area of about 331,000 square kilometres and a population of over 100 million, it is the world's fifteenth-most populous country. Its capital is Hanoi, while its largest city is Ho Chi Minh City, commonly known as Saigon.