Conn. Gen. Stat. § 6-1
There shall be in the state eight counties, which shall be constituted as follows:
Hartford County. The towns of Hartford, Avon, Berlin, Bloomfield, Bristol, Burlington, Canton, East Granby, East Hartford, East Windsor, Enfield, Farmington, Glastonbury, Granby, Hartland, Manchester, Marlborough, New Britain, Newington, Plainville, Rocky Hill, Simsbury, Southington, South Windsor, Suffield, West Hartford, Wethersfield, Windsor and Windsor Locks shall constitute one county by the name of the county of Hartford.
New Haven County. The towns of New Haven, Ansonia, Beacon Falls, Bethany, Branford, Cheshire, Derby, East Haven, Guilford, Hamden, Madison, Meriden, Middlebury, Milford, Naugatuck, North Branford, North Haven, Orange, Oxford, Prospect, Seymour, Southbury, Wallingford, Waterbury, West Haven, Wolcott and Woodbridge shall constitute one county by the name of the county of New Haven.
New London County. The towns of New London, Norwich, Bozrah, Colchester, East Lyme, Franklin, Griswold, Groton, Lebanon, Ledyard, Lisbon, Lyme, Montville, North Stonington, Old Lyme, Preston, Salem, Sprague, Stonington, Voluntown and Waterford shall constitute one county by the name of the county of New London.
Fairfield County. The towns of Bridgeport, Danbury, Bethel, Brookfield, Darien, Easton, Fairfield, Greenwich, Monroe, New Canaan, New Fairfield, Newtown, Norwalk, Redding, Ridgefield, Shelton, Sherman, Stamford, Stratford, Trumbull, Weston, Westport and Wilton shall constitute one county by the name of the county of Fairfield.
Windham County. The towns of Windham, Putnam, Ashford, Brooklyn, Canterbury, Chaplin, Eastford, Hampton, Killingly, Plainfield, Pomfret, Scotland, Sterling, Thompson and Woodstock shall constitute one county by the name of the county of Windham.
Litchfield County. The towns of Litchfield, Barkhamsted, Bethlehem, Bridgewater, Canaan, Colebrook, Cornwall, Goshen, Harwinton, Kent, Morris, New Hartford, New Milford, Norfolk, North Canaan, Plymouth, Roxbury, Salisbury, Sharon, Thomaston, Torrington, Warren, Washington, Watertown, Winchester and Woodbury shall constitute one county by the name of the county of Litchfield.
Middlesex County. The towns of Middletown, Chester, Clinton, Cromwell, Deep River, Durham, East Haddam, East Hampton, Essex, Haddam, Killingworth, Middlefield, Old Saybrook, Portland and Westbrook shall constitute one county by the name of the county of Middlesex.
Tolland County. The towns of Tolland, Vernon, Andover, Bolton, Columbia, Coventry, Ellington, Hebron, Mansfield, Somers, Stafford, Union and Willington shall constitute one county by the name of the county of Tolland.
Conn. Gen. Stat. § 6-1
(1949 Rev., S. 422.)