Xiuzhou or Xiu Prefecture was a zhou (prefecture) in imperial China, centering on modern Jiaxing, Zhejiang, China. Its administrative area contained most of modern Shanghai. It was created by the Wuyue kingdom in 938; in 1195, the Song dynasty renamed it Jiaxing Prefecture.

The administrative region of Xiu Prefecture in the Song dynasty was in modern and northern Zhejiang and southern and central Shanghai. It probably includes parts of modern:

• Under the administration of Jiaxing, Zhejiang:
  • Jiaxing
  • Pinghu
  • Tongxiang
  • Haiyan County
  • Jiashan County
• Under the administration of Shanghai:
  • Shanghai (except for Jiading District, Baoshan District and Chongming County)

• Jiaxing Prefecture

• 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. 1278. ISBN 7-5004-4929-1.

30°44′N 120°44′E / 30.73°N 120.73°E / 30.73; 120.73