Connecticut 2019 Population By County
Updated on June 22, 2021.

According to the US Census Bureau population estimates, there were 3,565,287 people living in Connecticut in 2019. Fairfield County was the most populated county with 943,332 residents, followed by Hartford County with 891,720 residents, and New Haven County with 854,757 residents. Windham County with a population of 116,782 was the least populated county in Connecticut in 2019.

Use the map below to interactively explore the population of each county in Connecticut in 2019. The data can also be explored further by sorting and filtering with the table below.

Connecticut 2019 Population By County
See also Population estimate for other years:
Table of Connecticut 2019 Population By County
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County Population % of State Population
Fairfield 943,332 26.46%
Hartford 891,720 25.01%
Litchfield 180,333 5.06%
Middlesex 162,436 4.56%
New Haven 854,757 23.97%
New London 265,206 7.44%
Tolland 150,721 4.23%
Windham 116,782 3.28%