Connecticut Counties by Population

The most populated counties in Connecticut are Capitol Planning Region with 977,165, Western Connecticut Planning Region at 620,666, South Central Connecticut Planning Region with 571,298, Naugatuck Valley Planning Region at 451,887, and Greater Bridgeport Planning Region with 326,381. You can get the most current Census population data for all 9 Connecticut counties, sorted from the most populous counties in Connecticut to the least, according to the 2022 American Community Survey.

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Rank County Population
1 Capitol Planning Region 977,165
2 Western Connecticut Planning Region 620,666
3 South Central Connecticut Planning Region 571,298
4 Naugatuck Valley Planning Region 451,887
5 Greater Bridgeport Planning Region 326,381
6 Southeastern Connecticut Planning Region 280,293
7 Lower Connecticut River Valley Planning Region 175,244
8 Northwest Hills Planning Region 112,696
9 Northeastern Connecticut Planning Region 95,687

United States Census Bureau. B01001 SEX BY AGE, 2022 American Community Survey 5-Year Estimates. U.S. Census Bureau, American Community Survey Office. Web. 7 December 2023.


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