丰沙湾是老挝的城镇，也是川圹省的首府，位于该国北部，海拔高度1,100米，受副热带湿润气候影响，每年平均降雨量1,444毫米，2009年人口37,507。

Phonsavan (Lao: ໂພນສະຫວັນ) (population 37,507) is the capital of Xiangkhoang Province. The name stands for "hills of paradise".

Phonsavan is the provincial capital of Xiangkhouang Province. The countryside is dominated by green hills and pine forests. Villages consist of colourful wooden houses. Cattle raising is one of the main agricultural activities and Hmong cowboys with brown and violet cowboy hats are a common sight. During Hmong New Year there are bullfights in the city. Phonsavan was built in the late 1970s and replaced the old Xiangkhouang (today: Muang Khoun) which had been destroyed during the Second Indochina War. Phonsavan's most famous attraction is the nearby Plain of Jars, which has been nominated for UNESCO World Heritage status. The main economic activity in Phonsavan is based on government administration, mining companies from China and Australia, tourism, and the work of NGOs related to clearing unexploded ordnance.