Zhangzhou (Chinese pinyin: Zhāngzhōu) is a prefecture-level city in southern Fujian province, People's Republic of China. Located on the banks of the Jiulong River (Beixi), Zhangzhou borders the cities of Xiamen  and Quanzhou  to the northeast, Longyan City to the northwest and the province of Guangdong to the southwest.

Zhangzhou is home to 4,809,983 inhabitants at the 2010 census whom those of Longwen and Xiacheng districts are condisered as urban. The built up area now include these 2 previous districts, the city of Longhai and reaches Xiamen 3,531,147 inhabitants. The 2 cities built up area (ie Metro area) is now home to about 5 millions inhabitants in 2010.

In older English works, its name may appear as Chang-chow or Changchow and in Southeast Asian contexts it appears as Chiang-chew or Chiang Chew from the Hokkien name.