From Longman Dictionary of Contemporary Englishcounty townˌcounty ˈtown British English, county seat American English noun [countable] SGthe town in a county where its government is
Examples from the Corpus
county town• Northampton was another elegant county town and regional market centre and was known far and wide for its horse fairs.• Chester, a flourishing county town, had the King's School founded in 1541.• Louth's county town, Dundalk, is very near Belfast.• Even the smallest county town could become the Mecca of the surplus rural population.• Salisbury, quiet cathedral city, the county town of Wiltshire near to which is the village in which Mr Pecksniff lives.• Not only was Buckinghamshire small, its inadequate internal communications served to check the evolution of a true county town. 