county seat; county town
Refers to the town or city where the administrative offices of a county (郡) are located. Used in contexts describing local government or geography.
This town has prospered as the county seat.
The county seat has a concentration of courthouses and police stations.
Compound of 郡 (county), 庁 (government office), and 所在地 (location). The term follows the pattern of other administrative seat words like 県庁所在地.