Connecticut Citizen Population By County in 2011 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2011, the citizen population for Connecticut was 3,305,815 and represented 92.91% of the total Connecticut population.

Among all Connecticut counties, Hartford had the highest citizen population (827.89K), followed by New Haven (805.98K), and Fairfield (804.91K).

In terms of percentages, Windham had the highest percentage of its population being citizens (97.42%), followed by Litchfield (97.39%), and Tolland (96.85%).

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 2011
Connecticut Citizen Population By County in 2011
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County Citizen Population % of County Population
Hartford 827890 92.96
New Haven 805975 93.85
Fairfield 804905 88.34
New London 261220 95.72
Litchfield 184770 97.39
Middlesex 159140 96.29
Tolland 147000 96.85
Windham 114920 97.42