Houaphanh Province
Xiangkhouang Province covers an area of and has largely a mountainous topography. The province borders Luang Prabang Province to the northwest, Houaphanh Province to the northeast, Vietnam to the east, Bolikhamsai Province to the southeast, and Vientiane Province to the southwest. The capital is Phonsavan. Xiangkhouang and Vientiane Provinces are part of the Nam Ngum River watershed.