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 2021, at 53.6 years. Strafford County had the lowest, at 37 years. The median was 43.9 years and the figure for New Hampshire was 43 years. Source: the U.S. Census Bureau.

Highest53.6Carroll County
Lowest37Strafford County
Median43.910 counties
New Hampshire43History

All counties, 2021

CSVChart (SVG)

Carroll CountyCarroll County: 53.6 years53.6Coos CountyCoos County: 48.8 years48.8Belknap CountyBelknap County: 47.5 years47.5Sullivan CountySullivan County: 46.5 years46.5Rockingham CountyRockingham County: 44.6 years44.6Cheshire CountyCheshire County: 43.1 years43.1Grafton CountyGrafton County: 43.1 years43.1Merrimack CountyMerrimack County: 43 years43Hillsborough CountyHillsborough County: 40.9 years40.9Strafford CountyStrafford County: 37 years37
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2021
years
1Carroll County53.6
2Coos County48.8
3Belknap County47.5
4Sullivan County46.5
5Rockingham County44.6
6Cheshire County43.1
6Grafton County43.1
8Merrimack County43
9Hillsborough County40.9
10Strafford County37

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/2021/table-based-SF/data/5YRData/acsdt5y2021-b01002.dat. Retrieved 2026-10-08.

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Questions

Which county has the highest median age?

Carroll County, with 53.6 years in 2021, according to the U.S. Census Bureau.

Which county has the lowest median age?

Strafford County, with 37 years 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, 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