Largest Counties in Connecticut

Rank County Population County seat Established Population Area (km2) Density
1 Fairfield County 916,818 Bridgeport 1666 916,829 1,621 565.59
2 Hartford County 894,003 Hartford 1666 894,014 1,906 469.05
3 New Haven County 862,466 New Haven 1666 862,477 1,570 549.34
4 New London County 274,044 New London 1666 274,055 1,725 158.87
5 Litchfield County 189,916 Litchfield 1751 189,927 2,383 79.7
6 Middlesex County 165,665 Middletown 1785 165,676 956 173.29
7 Tolland County 152,680 Rockville 1785 152,691 1,062 143.77
8 Windham County 118,417 Willimantic 1726 118,428 1,329 89.1

Largest Counties in Connecticut

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