Connecticut Citizen Population By County in 2017 (ACS-5Yrs)

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2017, the citizen population for Connecticut was 3,340,090 and represented 92.92% of the total Connecticut population.

Among all Connecticut counties, Hartford had the highest citizen population (835.79K), followed by Fairfield (835.06K), and New Haven (811.04K).

In terms of percentages, Windham had the highest percentage of its population being citizens (97.04%), followed by Tolland (96.75%), and New London (96.73%).

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.