Data / Rankings / Median age / Counties in New Hampshire

Counties in New Hampshire by median age

Carroll County had the highest median age of 10 counties in 2023, at 54.2 years. Strafford County had the lowest, at 37.9 years. The median was 44.4 years and the figure for New Hampshire was 43.2 years. Source: the U.S. Census Bureau.

Highest54.2Carroll County
Lowest37.9Strafford County
Median44.410 counties
New Hampshire43.2History

All counties, 2023

CSVChart (SVG)

Carroll CountyCarroll County: 54.2 years54.2Coos CountyCoos County: 49.9 years49.9Belknap CountyBelknap County: 48.3 years48.3Sullivan CountySullivan County: 47.3 years47.3Rockingham CountyRockingham County: 44.8 years44.8Grafton CountyGrafton County: 44 years44Cheshire CountyCheshire County: 43.5 years43.5Merrimack CountyMerrimack County: 42.6 years42.6Hillsborough CountyHillsborough County: 41 years41Strafford CountyStrafford County: 37.9 years37.9
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2023
years		Change on 2022
1Carroll County54.2+0.4
2Coos County49.9+0.2
3Belknap County48.3+0.5
4Sullivan County47.3+0.3
5Rockingham County44.8+0.1
6Grafton County44-0.1
7Cheshire County43.50
8Merrimack County42.6-0.2
9Hillsborough County41+0.1
10Strafford County37.9+0.2

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?

Carroll County, with 54.2 years in 2023, according to the U.S. Census Bureau.

Which county has the lowest median age?

Strafford County, with 37.9 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 New Hampshire: more rankings