Data / Rankings / Population aged 18 to 64 / Counties in New Hampshire

Counties in New Hampshire by population aged 18 to 64

Strafford County had the highest population aged 18 to 64 of 10 counties in 2019, at 65.8%. Carroll County had the lowest, at 55.5%. The median was 61.7% and the figure for New Hampshire was 62.4%. Source: the U.S. Census Bureau.

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Highest65.8Strafford County
Lowest55.5Carroll County
Median61.710 counties
New Hampshire62.4History

Map of counties, 2019

Belknap County: 58.4 %Carroll County: 55.5 %Cheshire County: 61.3 %Coos County: 58.3 %Grafton County: 62.8 %Hillsborough County: 63.6 %Merrimack County: 62.3 %Rockingham County: 62.2 %Strafford County: 65.8 %Sullivan County: 59.2 %
  • Under 58
  • 58 to 60
  • 60 to 62
  • 62 to 63
  • 63 and over
%, 2019. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2019

Strafford County: 65.8 %Strafford County65.8Hillsborough County: 63.6 %Hillsborough County63.6Grafton County: 62.8 %Grafton County62.8Merrimack County: 62.3 %Merrimack County62.3Rockingham County: 62.2 %Rockingham County62.2Cheshire County: 61.3 %Cheshire County61.3Sullivan County: 59.2 %Sullivan County59.2Belknap County: 58.4 %Belknap County58.4Coos County: 58.3 %Coos County58.3Carroll County: 55.5 %Carroll County55.5Strafford County: 65.8 %Strafford County65.8Hillsborough County: 63.6 %Hillsborough County63.6Grafton County: 62.8 %Grafton County62.8Merrimack County: 62.3 %Merrimack County62.3Rockingham County: 62.2 %Rockingham County62.2Cheshire County: 61.3 %Cheshire County61.3Sullivan County: 59.2 %Sullivan County59.2Belknap County: 58.4 %Belknap County58.4Coos County: 58.3 %Coos County58.3Carroll County: 55.5 %Carroll County55.5
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2019 (%)Change on 2018
1Strafford County65.8-0.3 pts
2Hillsborough County63.6-0.3 pts
3Grafton County62.8-0.4 pts
4Merrimack County62.3-0.4 pts
5Rockingham County62.2-0.4 pts
6Cheshire County61.3-0.5 pts
7Sullivan County59.2-0.4 pts
8Belknap County58.4-0.6 pts
9Coos County58.3-0.9 pts
10Carroll County55.5-0.7 pts

Other periods

About this ranking

Residents aged 18 to 64 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.

Not comparable with working-age shares for ages 15 to 64 used in EU and World Bank statistics.

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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (Counties in New Hampshire by population aged 18 to 64, 2019) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in New Hampshire by population aged 18 to 64, 2019. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-18-64/new-hampshire-counties?period=2019. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Counties in New Hampshire by population aged 18 to 64, 2019. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/population-18-64/new-hampshire-counties?period=2019.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in New Hampshire by population aged 18 to 64, 2019 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-18-64/new-hampshire-counties?period=2019 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_new_hampshire_2019,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in New Hampshire by population aged 18 to 64, 2019}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/population-18-64/new-hampshire-counties?period=2019. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
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AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in New Hampshire by population aged 18 to 64, 2019
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/population-18-64/new-hampshire-counties?period=2019
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/new-hampshire-counties?period=2019.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -
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Rank Counties in New Hampshire by population aged 18 to 64 using official data, and cite the source.
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Questions

Which county has the highest population aged 18 to 64?

Strafford County, with 65.8% in 2019, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Carroll County, with 55.5% in 2019.

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: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Retrieved 2026-10-12.

Population aged 18 to 64: other rankings

Counties in New Hampshire: more rankings