Cheng'an is a county in southern Hebei province, China. It lies under the administration of Handan City, which is located about 25 km (16 mi) to the northwest of the county.
The county is situated in the southern part of Hebei, a province in northern China. Its position within Handan's administrative area places it in the broader southern Hebei region, near the border with Henan province to the south.
Cheng'an is one of the counties that make up the Handan municipal jurisdiction. The seat of Handan lies to the northwest, serving as the nearest major urban centre for the county.