Synonyms for County town:

n.

capital, county seat, city, city state, burg, boom town, the big smoke, dormitory town, conurbation. county town (noun)
shire town.
location (noun)
shire town.

Other synonyms:

city state, boom town, the big smoke, conurbation, county seat, burg, dormitory town. city. capital. Other relevant words:
capital, county seat.