Yuncheng 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 (Weinan) provinces to the east, south and west, respectively. As of the 2020 census, its population was 4,774,508 inhabitants, of whom 928,334 lived in the built-up area made of Yanhu District. One can note than Pinglu County, 205,080 inhabitants in the south, is now part of Sanmenxia built-up area.

Shanxi is an inland province of China and is part of the North China region. The capital and largest city of the province is Taiyuan, while its next most populated prefecture-level cities are Changzhi and Datong. Its one-character abbreviation is "晋", after the state of Jin that existed there during the Spring and Autumn period.