Synonyms for County seat:

n.

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

Other synonyms:

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