Xiangkhouang (Lao: ຊຽງຂວາງ, meaning "Horizontal City") is a province of Laos, located in the Xiangkhouang Plateau, north-east of the country.Originally known as Muang Phouan, the present capital of the province is Phonsavan. The population of the province as of March 2005 census is 229,521.