Lang Son is a province in far northern Vietnam, bordering Guangxi province in China. Its capital is also called Lang Son, which is a strategically important town at the border with China and is 137 kilometres (85 mi) northeast of Hanoi connected by rail and road. Lang Son Province is bounded by China in the north, Cao Bang Province borders the northwest, Ha Bac Province to the south, Quang Ninh Province starting on the south and extending to the eastern border and Thai Nguyen Province to the west. The province covers an area of 8,327.6 square kilometres and as of 2008 it had a population of 759,000.
Lang Son Province, Ha Giang, Lao Cai, Bac Giang, Bac Kan, Cao Bang, Phu Tho, Quang Ninh, Thai Nguyen, Tuyen Quang and Yen Bai of the Northeast region are all part of the 59 administrative provinces and five municipalities in Vietnam.
