Connecticut Citizen Voting-age Population By County in 2023 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2023, the citizen voting-age population for Connecticut was 2,641,585 and represented 73.41% of the total Connecticut population.

Among all Connecticut counties, Capitol Planning Region had the highest citizen voting-age population (718.16K), followed by South Central Connecticut Planning Region (422.12K), and Western Connecticut Planning Region (421.41K).

In terms of percentages, Lower Connecticut River Valley Planning Region had the highest percentage of its population being citizens of voting-age (80.31%), followed by Northeastern Connecticut Planning Region (79.61%), and Northwest Hills Planning Region (78.63%).

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

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

See this for other years:
Connecticut Citizen Voting-age Population By County in 2023
Connecticut Citizen Voting-age Population By County in 2023
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County Citizen Voting-age Population % of County Population
Capitol Planning Region 718155 74.11
South Central Connecticut Planning Region 422120 74.47
Western Connecticut Planning Region 421405 67.83
Naugatuck Valley Planning Region 337795 74.68
Greater Bridgeport Planning Region 221790 67.97
Southeastern Connecticut Planning Region 214770 76.97
Lower Connecticut River Valley Planning Region 140530 80.31
Northwest Hills Planning Region 88735 78.63
Northeastern Connecticut Planning Region 76285 79.61