Yunzhou or Yun Prefecture (Chinese: 雲州) was a zhou (prefecture) in imperial China seated in modern Datong, Shanxi, China. It existed (intermittently) from 640 to 1044.
It was one of the Sixteen Prefectures.
- Shi Weile, ed. (2005). Zhongguo Lishi Diming Da Cidian (中国历史地名大词典) [Large Dictionary of Chinese Historical Place Names] (in Chinese). China Social Sciences Press. p. 320. ISBN 7-5004-4929-1.