List of counties in Connecticut

This is a list of counties in Connecticut. There are eight counties in the U.S. state of Connecticut. Four of them were formed in 1666, when the colony of Connecticut was made from a number of smaller colonies. Two counties were made during colonial times, and two counties, Middlesex and Tolland, were formed after American independence (both in 1785). Six of the counties are named for locations in England, where many early Connecticut settlers were from.^[1] Although Connecticut is comprised of counties, after their abolishment in 1960, the roles of local government have been performed individually by Connecticut's 169 cities and towns.^[2][3]

Connecticut counties

Alphabetical listing

County	FIPS code[4]	County seat(defunct) [5]	Established[5]	Origin[1]	Meaning of name[6]	Population (2020)[5][7]	Area[5]	Map
Fairfield County	001	Fairfield (1666-1853) Bridgeport (1853-1960)	1666	One of four original counties formed in Connecticut	From the hundreds of acres of salt marsh that bordered the coast.	957,419	626 sq mi (1,621 km2)
Hartford County	003	Hartford (1666-1960)	1666	One of four original counties formed in Connecticut	After the county of Hertfordshire in the UK	899,498	736 sq mi (1,906 km2)
Litchfield County	005	Litchfield (1751-1960)	1751	From parts of Fairfield County, Hartford County, and New Haven County	City of Lichfield in the UK	185,186	920 sq mi (2,383 km2)
Middlesex County	007	Middletown (1785-1960)	1785	From parts of Hartford County and New London County	Former county of Middlesex in the UK	164,245	369 sq mi (956 km2)
New Haven County	009	New Haven (1666-1960)	1666	One of four original counties formed in Connecticut	After New Haven Colony, founded as a haven in which Puritans could be free from persecution	864,835	606 sq mi (1,570 km2)
New London County	011	New London (1666-1960)	1666	One of four original counties formed in Connecticut	After London, UK	268,555	666 sq mi (1,725 km2)
Tolland County	013	Tolland (1785-1889) Rockville (1889-1960)	1785	From parts of Hartford County, and Windham County	Hamlet of Tolland, Somerset, UK	149,788	410 sq mi (1,062 km2)
Windham County	015	Windham (1726-1819) Brooklyn (1819-1895) Willimantic and Putnam (1895-1960)	1726	From parts of Hartford County, and New London County	After Windham (now Wineham) in Sussex, England	116,418	513 sq mi (1,329 km2)

Former counties

• Trumbull County, Ohio - The Connecticut Western Reserve, given to Ohio in 1800.
• Westmoreland County, Connecticut - An area around Wilkes-Barre, given to Pennsylvania in 1784.