Connecticut Population By County in 2019

Updated on January 29, 2024.

Based on the US Census Vintage data estimates, in 2019, the population of Connecticut was 3,566,022. Among all Connecticut counties, Fairfield had the highest population (944,388), followed by Hartford (891,349), and New Haven (853,818). Windham was the least populated county (116,884).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.

See this for other years:
Connecticut Population By County in 2019
Connecticut Population By County in 2019
County
Population
% of State Population
Fairfield 944,388 26.48
Hartford 891,349 25.00
New Haven 853,818 23.94
New London 265,784 7.45
Litchfield 180,396 5.06
Middlesex 162,538 4.56
Tolland 150,865 4.23
Windham 116,884 3.28
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