Location of the seat in Hebei
|Country||People's Republic of China|
|County seat||Zhangbei Town|
|• Total||4,185 km2 (1,616 sq mi)|
|• Density||88/km2 (230/sq mi)|
|Time zone||UTC+8 (China Standard)|
Zhangbei County (simplified Chinese: 张北县; traditional Chinese: 張北縣; pinyin: Zhāngběi Xiàn), in northwestern Hebei province, China, is a county formerly in the Chahar province. Its name, which literally means "North of Zhang[jiakou]", derives from the fact that it is 40 km (25 mi) north-northeast of Zhangjiakou. Zhangbei Town is the seat of the county government.
There are 4 towns and 14 townships under the county's administration.