Data / Rankings / Median age / Counties in Connecticut

Counties in Connecticut by median age

Northwest Hills Planning Region had the highest median age of 9 counties in 2023, at 47.1 years. Greater Bridgeport Planning Region had the lowest, at 40 years. The median was 41.5 years and the figure for Connecticut was 41.2 years. Source: the U.S. Census Bureau.

Highest47.1Northwest Hills Planning Region
Lowest40Greater Bridgeport Planning Region
Median41.59 counties
Connecticut41.2History

All counties, 2023

CSVChart (SVG)

Northwest Hills Planning RegionNorthwest Hills Planning Region: 47.1 years47.1Lower Connecticut River Valley Pl…Lower Connecticut River Valley Planning Region: 45.8 years45.8Northeastern Connecticut Planning…Northeastern Connecticut Planning Region: 43.9 years43.9Naugatuck Valley Planning RegionNaugatuck Valley Planning Region: 41.9 years41.9Western Connecticut Planning Regi…Western Connecticut Planning Region: 41.5 years41.5Southeastern Connecticut Planning…Southeastern Connecticut Planning Region: 41 years41Capitol Planning RegionCapitol Planning Region: 40.2 years40.2South Central Connecticut Plannin…South Central Connecticut Planning Region: 40.2 years40.2Greater Bridgeport Planning RegionGreater Bridgeport Planning Region: 40 years40
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2023
years		Change on 2022
1Northwest Hills Planning Region47.1+2
2Lower Connecticut River Valley Planning Region45.8+0.2
3Northeastern Connecticut Planning Region43.9+2.2
4Naugatuck Valley Planning Region41.9+0.8
5Western Connecticut Planning Region41.5+0.4
6Southeastern Connecticut Planning Region41-0.6
7Capitol Planning Region40.2+0.4
7South Central Connecticut Planning Region40.2+0.3
9Greater Bridgeport Planning Region40-0.5

Other periods

About this ranking

Age that divides the resident population into two halves of equal size. Spain and the EU: on 1 January. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

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. American Community Survey 5-year estimates, table B01002: median age, total population. https://www2.census.gov/programs-surveys/acs/summary_file/2023/table-based-SF/data/5YRData/acsdt5y2023-b01002.dat. Retrieved 2026-10-08.

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Questions

Which county has the highest median age?

Northwest Hills Planning Region, with 47.1 years in 2023, according to the U.S. Census Bureau.

Which county has the lowest median age?

Greater Bridgeport Planning Region, with 40 years in 2023.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, American Community Survey 5-year estimates, table B01002: median age, total population. Retrieved 2026-10-08.

Median age: other rankings

Counties in Connecticut: more rankings