Chicheng (Chinese: 赤城; pinyin: Chìchéng), or Ch’ih-ch’eng, is a county under the administration of Zhangjiakou City, northwestern Hebei province, bordering Beijing to the southeast.

The total area of the county is 5,287 square kilometres (2,041 sq mi).

The easternmost county-level division of Zhangjiakou, it administrates 9 towns and 9 townships, and as of 2010[update], has a population of 238,169.

China National Highway 112 passes through the county just south of the county seat, Chicheng Town (赤城镇).

Chicheng County is divided into the following 18 divisions:[1] Towns: Townships: