Data / Rankings / Population aged 65 and over / Counties in Connecticut

Counties in Connecticut by share of population aged 65 and over

Northwest Hills Planning Region had the highest share of population aged 65 and over of 9 counties in 2021, at 23.8%. Greater Bridgeport Planning Region had the lowest, at 15.8%. The median was 19.1% and the figure for Connecticut was 18.4%. Source: the U.S. Census Bureau.

Highest23.8Northwest Hills Planning Region
Lowest15.8Greater Bridgeport Planning Region
Median19.19 counties
Connecticut18.4History

All counties, 2021

CSVChart (SVG)

Northwest Hills Planning RegionNorthwest Hills Planning Region: 23.8 %23.8Lower Connecticut River Valley Pl…Lower Connecticut River Valley Planning Region: 22.5 %22.5Naugatuck Valley Planning RegionNaugatuck Valley Planning Region: 19.1 %19.1Northeastern Connecticut Planning…Northeastern Connecticut Planning Region: 19.1 %19.1Southeastern Connecticut Planning…Southeastern Connecticut Planning Region: 19.1 %19.1South Central Connecticut Plannin…South Central Connecticut Planning Region: 18.6 %18.6Capitol Planning RegionCapitol Planning Region: 18.3 %18.3Western Connecticut Planning Regi…Western Connecticut Planning Region: 16.6 %16.6Greater Bridgeport Planning RegionGreater Bridgeport Planning Region: 15.8 %15.8
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2021 (%)Change on 2020
1Northwest Hills Planning Region23.8+0.7 pts
2Lower Connecticut River Valley Planning Region22.5+0.5 pts
3Naugatuck Valley Planning Region19.1+0.5 pts
4Northeastern Connecticut Planning Region19.1+0.5 pts
5Southeastern Connecticut Planning Region19.1+0.4 pts
6South Central Connecticut Planning Region18.6+0.3 pts
7Capitol Planning Region18.3+0.4 pts
8Western Connecticut Planning Region16.6+0.3 pts
9Greater Bridgeport Planning Region15.8+0.4 pts

Other periods

About this ranking

Residents aged 65 or over as a percentage of total population. Spain: 1 January, INE annual census. United States: 1 July, Census Bureau population estimates. World Bank figures for other countries and the World refer to mid-year.

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, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/counties/asrh/cc-est2025-agesex-all.csv. Retrieved 2026-10-09.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Connecticut by share of population aged 65 and over using official data, and cite the source.
rank_places {"indicator":"population_65_plus_share","level":"province","within":"Connecticut","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_65_plus_share&level=province&within=Connecticut&limit=10

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Questions

Which county has the highest share of population aged 65 and over?

Northwest Hills Planning Region, with 23.8% in 2021, according to the U.S. Census Bureau.

Which county has the lowest share of population aged 65 and over?

Greater Bridgeport Planning Region, with 15.8% in 2021.

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, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. Retrieved 2026-10-09.

Population aged 65 and over: other rankings

Counties in Connecticut: more rankings