Zhangjiakou is prefecture city under the jurisdiction Hebei Province, located in the Hebei Province, Beijing, Hebei, Shanxi and Mongolia, and intersection of Beijing Tianjin Hebeicircle and Hebei circle.

张家口市，是河北省下辖地级市，地处河北省西北部，京、冀、晋、蒙四省市交界处，是京津冀经济圈和冀晋蒙经济圈的交汇点。