Data / Rankings / Population aged 65 and over / Counties in New Hampshire

Counties in New Hampshire by share of population aged 65 and over, 2025

Carroll County had the highest share of population aged 65 and over of 10 counties in 2025, at 35.2%. Strafford County had the lowest, at 19.7%. The median was 25.1% and the figure for New Hampshire was 23%. Source: the U.S. Census Bureau.

Highest35.2Carroll County
Lowest19.7Strafford County
Median25.110 counties
New Hampshire23History

All counties, 2025

CSVChart (SVG)

Carroll CountyCarroll County: 35.2 %35.2Coos CountyCoos County: 28.5 %28.5Belknap CountyBelknap County: 28.2 %28.2Grafton CountyGrafton County: 25.6 %25.6Sullivan CountySullivan County: 25.5 %25.5Cheshire CountyCheshire County: 24.7 %24.7Rockingham CountyRockingham County: 23.6 %23.6Merrimack CountyMerrimack County: 23 %23Hillsborough CountyHillsborough County: 19.8 %19.8Strafford CountyStrafford County: 19.7 %19.7
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2025 (%)Change on 2024
1Carroll County35.2+1 pts
2Coos County28.5+0.5 pts
3Belknap County28.2+0.9 pts
4Grafton County25.6+0.7 pts
5Sullivan County25.5+0.5 pts
6Cheshire County24.7+0.6 pts
7Rockingham County23.6+0.9 pts
8Merrimack County23+0.7 pts
9Hillsborough County19.8+0.6 pts
10Strafford County19.7+0.6 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 New Hampshire 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":"New Hampshire","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_65_plus_share&level=province&within=New%20Hampshire&limit=10

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Questions

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

Carroll County, with 35.2% in 2025, according to the U.S. Census Bureau.

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

Strafford County, with 19.7% in 2025.

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 New Hampshire: more rankings