Population of Counties in Connecticut (2018)

Name 2018 Population Growth Since 2010
Fairfield County949,9213.28%
Hartford County895,388-0.01%
New Haven County860,435-0.37%
New London County269,033-1.83%
Litchfield County182,177-4.03%
Middlesex County163,410-1.34%
Tolland County151,461-1.14%
Windham County116,359-1.89%