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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