Interpretation of Demographics Data
Demographic Data Report for New Hampshire by County
Population: Age under 18
All Races (includes Hispanic), Both Sexes
2020-2024 American Community Survey 5-Year Data
Sorted by Percent
New Hampshire
- 2023 Rural-Urban Continuum Codes Φ : N/A
- Value (Percent) : The value is 18.2 percent.
- People (Age Under 18) : The number of people (age under 18) is 254,480.
- Rank within US : This county is ranked 49 of 52
United States
- 2023 Rural-Urban Continuum Codes Φ : N/A
- Value (Percent) : The value is 22.0 percent.
- People (Age Under 18) : The number of people (age under 18) is 73,517,834.
- Rank within US : N/A
Carroll County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 14.7 percent.
- People (Age Under 18) : The number of people (age under 18) is 7,631.
- Rank within US : This county is ranked 3060 of 3143
Grafton County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 15.6 percent.
- People (Age Under 18) : The number of people (age under 18) is 14,414.
- Rank within US : This county is ranked 3005 of 3143
Coos County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 16.0 percent.
- People (Age Under 18) : The number of people (age under 18) is 5,014.
- Rank within US : This county is ranked 2976 of 3143
Belknap County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 17.3 percent.
- People (Age Under 18) : The number of people (age under 18) is 11,189.
- Rank within US : This county is ranked 2848 of 3143
Strafford County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 17.6 percent.
- People (Age Under 18) : The number of people (age under 18) is 23,399.
- Rank within US : This county is ranked 2794 of 3143
Sullivan County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 17.7 percent.
- People (Age Under 18) : The number of people (age under 18) is 7,757.
- Rank within US : This county is ranked 2775 of 3143
Cheshire County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 17.8 percent.
- People (Age Under 18) : The number of people (age under 18) is 13,760.
- Rank within US : This county is ranked 2756 of 3143
Merrimack County
- 2023 Rural-Urban Continuum Codes Φ : Rural
- Value (Percent) : The value is 18.4 percent.
- People (Age Under 18) : The number of people (age under 18) is 28,657.
- Rank within US : This county is ranked 2659 of 3143
Rockingham County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 18.5 percent.
- People (Age Under 18) : The number of people (age under 18) is 58,963.
- Rank within US : This county is ranked 2641 of 3143
Hillsborough County
- 2023 Rural-Urban Continuum Codes Φ : Urban
- Value (Percent) : The value is 19.6 percent.
- People (Age Under 18) : The number of people (age under 18) is 83,696.
- Rank within US : This county is ranked 2372 of 3143
Notes:
Created by statecancerprofiles.cancer.gov on 03/21/2026 2:19 pm.
Φ Rural–urban county classifications are based on the 2023 USDA Rural–Urban Continuum Codes (except for Connecticut Counties which use 2013 codes). State-level cancer rates for rural areas are calculated using cancer cases registered exclusively in rural counties, while state-level cancer rates for urban areas are calculated using cases registered exclusively in urban counties.
Source: Demographic data provided by the Census Bureau and the American Community Survey.
For more information about Population: Age under 18, see the dictionary.
Data for United States does not include Puerto Rico.