Connecticut Counties by Population (2024)

by Kristen Carney Kristen Carney

Updated: June 20, 2024

The most populated counties in Connecticut are Capitol Planning Region with 975,328, Western Connecticut Planning Region at 623,907, South Central Connecticut Planning Region with 568,158, Naugatuck Valley Planning Region at 456,128, and Greater Bridgeport Planning Region with 327,651. 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 2023 Population Estimates Program.

Sure, you can copy this list right into your favorite spreadsheet tool. Or save yourself formatting headaches and grab the latest Connecticut counties population data as a ready-to-use Excel™ file below. It's time to stop searching and start digging into data!

Download the newest population data for Connecticut counties

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Rank County Population
1 Capitol Planning Region 975,328
2 Western Connecticut Planning Region 623,907
3 South Central Connecticut Planning Region 568,158
4 Naugatuck Valley Planning Region 456,128
5 Greater Bridgeport Planning Region 327,651
6 Southeastern Connecticut Planning Region 279,634
7 Lower Connecticut River Valley Planning Region 176,215
8 Northwest Hills Planning Region 113,463
9 Northeastern Connecticut Planning Region 96,692

United States Census Bureau. Annual Estimates of the Resident Population: April 1, 2020 to July 1, 2023. U.S. Census Bureau, Population Division. Web. May 2024.


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