the largest administrative division of a U.S. state

Miami, Florida, is in Dade County.

one of the chief administrative divisions of a country or state, as in Great Britain and Ireland.

one of the larger divisions for purposes of local administration, as in Canada and New Zealand.

the territory of a county, esp. its rural areas

We farmed out in the county before moving to town.

the inhabitants of a county

It was supposed to be a secret, but you told the whole county.

the domain of a count or earl.

noun

canton , constituency , division , shire , borough , district , parish , seat , subdivision