Data / Rankings / Population density / Counties in Connecticut

Counties in Connecticut by population density

Greater Bridgeport Planning Region had the highest population density of 9 counties in 2022, at 906.1 inhabitants per km². Northwest Hills Planning Region had the lowest, at 55.6 inhabitants per km². The median was 366.5 inhabitants per km² and the figure for Connecticut was 288.5 inhabitants per km². Source: the U.S. Census Bureau.

Highest906.1Greater Bridgeport Planning Region
Lowest55.6Northwest Hills Planning Region
Median366.59 counties
Connecticut288.5History

All counties, 2022

CSVChart (SVG)

Greater Bridgeport Planning RegionGreater Bridgeport Planning Region: 906.1 inhabitants per km²906.1South Central Connecticut Plannin…South Central Connecticut Planning Region: 598.8 inhabitants per km²598.8Western Connecticut Planning Regi…Western Connecticut Planning Region: 454.3 inhabitants per km²454.3Naugatuck Valley Planning RegionNaugatuck Valley Planning Region: 424.6 inhabitants per km²424.6Capitol Planning RegionCapitol Planning Region: 366.5 inhabitants per km²366.5Southeastern Connecticut Planning…Southeastern Connecticut Planning Region: 180.4 inhabitants per km²180.4Lower Connecticut River Valley Pl…Lower Connecticut River Valley Planning Region: 160.3 inhabitants per km²160.3Northeastern Connecticut Planning…Northeastern Connecticut Planning Region: 67 inhabitants per km²67Northwest Hills Planning RegionNorthwest Hills Planning Region: 55.6 inhabitants per km²55.6
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2022
inhabitants per km²		Change on 2021
1Greater Bridgeport Planning Region906.1+0.7%
2South Central Connecticut Planning Region598.8+0.1%
3Western Connecticut Planning Region454.3+0.3%
4Naugatuck Valley Planning Region424.6+0.4%
5Capitol Planning Region366.5+0.3%
6Southeastern Connecticut Planning Region180.4-0%
7Lower Connecticut River Valley Planning Region160.3+0.3%
8Northeastern Connecticut Planning Region67+0.5%
9Northwest Hills Planning Region55.6+0.2%

Other periods

About this ranking

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Questions

Which county has the highest population density?

Greater Bridgeport Planning Region, with 906.1 inhabitants per km² in 2022, according to the U.S. Census Bureau.

Which county has the lowest population density?

Northwest Hills Planning Region, with 55.6 inhabitants per km² in 2022.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved 2026-10-09.

Population density: other rankings

Counties in Connecticut: more rankings