Connecticut Citizen Population By County in 2016 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2016, the citizen population for Connecticut was 3,333,940 and represented 92.90% of the total Connecticut population.

Among all Connecticut counties, Hartford had the highest citizen population (833.16K), followed by Fairfield (831.21K), and New Haven (808.35K).

In terms of percentages, Windham had the highest percentage of its population being citizens (97.13%), followed by Tolland (96.75%), and Litchfield (96.71%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

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

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Connecticut Citizen Population By County in 2016
Connecticut Citizen Population By County in 2016
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County Citizen Population % of County Population
Hartford 833160 93.02
Fairfield 831205 88.27
New Haven 808345 93.90
New London 262780 96.60
Litchfield 179045 96.71
Middlesex 158930 96.65
Tolland 146755 96.75
Windham 113715 97.13