Connecticut Citizen Population By County in 2013 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2013, the citizen population for Connecticut was 3,328,720 and represented 92.89% of the total Connecticut population.

Among all Connecticut counties, Hartford had the highest citizen population (832.51K), followed by Fairfield (817.27K), and New Haven (810.96K).

In terms of percentages, Windham had the highest percentage of its population being citizens (97.25%), followed by Litchfield (96.92%), and Middlesex (96.69%).

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 2013
Connecticut Citizen Population By County in 2013
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County Citizen Population % of County Population
Hartford 832505 92.93
Fairfield 817265 88.24
New Haven 810960 94.01
New London 262820 95.89
Litchfield 182810 96.92
Middlesex 160200 96.69
Tolland 147285 96.67
Windham 114870 97.25