Connecticut 2019 Population By County

Updated on December 2, 2021.

According to the US Census Bureau population estimates, there were 3,566,022 people living in Connecticut in 2019. Fairfield County was the most populated county with 944,388 residents, followed by Hartford County with 891,349 residents, and New Haven County with 853,818 residents. Windham County with a population of 116,884 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 944388 26.48
Hartford 891349 25.00
Litchfield 180396 5.06
Middlesex 162538 4.56
New Haven 853818 23.94
New London 265784 7.45
Tolland 150865 4.23
Windham 116884 3.28