POPULATION OF CONNECTICUT BY COUNTIES

County 2010 2019 est. 
Fairfield 916,829 943,332
Hartford 894,014 891,720
Litchfield 189,927 180,333
Middlesex 165,676 162,436
New Haven 862,477 854,757
New London 274,055 265,206
Tolland 152,691 150,721
Windham 118,428 116,782
Total for the State 3,574,097 3,565,287

                                                  

SQUARE MILES OF CONNECTICUT BY COUNTIES

County Square Miles
Fairfield
837.0
Hartford
750.6
Litchfield
944.6
Middlesex
439.1
New Haven
862.1
New London
771.7
Tolland
417.0
Windham
521.5
Total for the State
5,543.6