Yùnchéng is the southernmost
prefecture-level city in
Shanxi province, People's Republic of China. It borders
Linfen and
Jincheng municipalities to the north and east, and
Henan and
Shaanxi provinces to the south and west. At the 2010 census, its population was 5,134,779 inhabitants whom 680,036 lived in the built-up (
or metro) area made of Yanhu District.