Demographics of Belknap County, New Hampshire

Belknap County, New Hampshire had 65,147 people on July 1, 2025, by the Census Bureau’s estimate: +1,368 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Belknap County, in four figures

65,147
Population: July 1, 2025, Vintage 2025 estimate.; +2.1%
Change since July 2020: +1,368 people.; 48.4 ±0.5
Median age: ACS 2020–⁠2024.; $92,783 ±$4,217
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Belknap County, New Hampshire's population grew 2.1% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Belknap County, New Hampshire's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

Belknap County, New Hampshire's population grew 2.1% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Belknap County, New Hampshire's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	63,779	100.0	100.0
2021	64,612	101.3	100.2
2022	64,643	101.4	100.7
2023	65,039	102.0	101.6
2024	65,169	102.2	102.5
2025	65,147	102.1	103.1

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Population of Belknap County, New Hampshire on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	63,779	+69	−78	0	+155
2021	64,612	+833	−350	+19	+1,201
2022	64,643	+31	−415	−19	+467
2023	65,039	+396	−348	−1	+738
2024	65,169	+130	−424	+5	+553
2025	65,147	−22	−418	−13	+415

Age, 2020–2024

The median age is 48.4 ±0.5: for men 47.3 ±0.6 and for women 49.2 ±0.4. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Belknap County by age, ACS 2020–2024
Age	People	Share	New Hampshire	United States
Under 5	2,548 ±126	3.9% ±0.2	4.5% ±<0.1	5.6% ±<0.1
5 to 17	8,641 ±537	13.4% ±0.8	13.7% ±0.2	16.3% ±<0.1
18 to 24	4,111 ±373	6.4% ±0.6	8.7% ±0.2	9.1% ±<0.1
25 to 44	14,570 ±584	22.5% ±0.9	25.0% ±0.2	26.9% ±<0.1
45 to 64	19,297 ±672	29.8% ±1.0	27.9% ±0.2	24.8% ±<0.1
65 and over	15,492 ±752	24.0% ±1.2	20.1% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $92,783 ±$4,217, and income per person $49,037 ±$2,273, in 2024 dollars. The median is $99,031 ±$1,123 in New Hampshire and $80,734 ±$166 in the United States.

Households by income

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Households in Belknap County by income, ACS 2020–2024
Household income	Households	Share	New Hampshire	United States
Under $25,000	3,183 ±459	12.1% ±1.7	10.4% ±0.3	14.6% ±<0.1
$25,000 to $49,999	4,109 ±566	15.6% ±2.1	13.4% ±0.4	16.7% ±<0.1
$50,000 to $74,999	3,688 ±472	14.0% ±1.8	14.3% ±0.4	15.5% ±<0.1
$75,000 to $99,999	3,023 ±384	11.5% ±1.4	12.4% ±0.3	12.6% ±<0.1
$100,000 to $149,999	5,895 ±628	22.4% ±2.3	20.0% ±0.5	17.5% ±<0.1
$150,000 to $199,999	2,963 ±384	11.3% ±1.4	12.7% ±0.3	9.6% ±<0.1
$200,000 or more	3,476 ±392	13.2% ±1.4	16.8% ±0.4	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Belknap County by age, ACS 2020–2024
Age	Below poverty	Rate	New Hampshire	United States
All ages	5,394 ±744	8.5% ±1.2	7.2% ±0.3	12.5% ±0.1
Under 18	1,219 ±282	11.1% ±2.5	7.9% ±0.6	16.1% ±0.1
18 to 59	2,064 ±374	6.5% ±1.2	6.8% ±0.3	11.6% ±0.1
60 and over	2,111 ±442	10.0% ±2.1	7.7% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Belknap County, ACS 2020–2024
Measure	Belknap County	New Hampshire	United States
Housing units	39,003 ±49	648,472 ±247	143,775,355 ±10,234
Occupied	67.5% ±1.9	85.7% ±0.3	89.9% ±0.1
Vacant	32.5% ±1.9	14.3% ±0.3	10.1% ±0.1
Owner occupied	80.1% ±1.8	72.8% ±0.4	65.2% ±0.3
Renter occupied	19.9% ±1.9	27.2% ±0.4	34.8% ±0.1
Median home value	$374,900 ±$10,174	$402,500 ±$2,808	$332,700 ±$236
Median gross rent	$1,167 ±$72	$1,491 ±$15	$1,413 ±$2
Median year built	1979 ±2	1979 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Belknap County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	New Hampshire	United States
Hispanic or Latino	1,467 ±0	2.3% ±<0.1	4.7% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	59,943 ±401	92.7% ±0.6	86.9% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	294 ±96	0.5% ±0.1	1.3% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	744 ±104	1.2% ±0.2	2.6% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 40	0% to 0.1%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 42	0% to 0.1%	< 0.1%	0.2% ±<0.1
Some other race alone, not Hispanic	69 to 623	0.1% to 1.0%	0.4% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	1,827 ±295	2.8% ±0.5	4.0% ±0.2	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Belknap County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	New Hampshire	United States
Born in the state	31,640 ±1,200	48.9% ±1.9	40.8% ±0.4	57.3% ±<0.1
Born in another state	30,451 ±1,158	47.1% ±1.8	51.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	761 ±263	1.2% ±0.4	1.3% ±0.1	1.7% ±<0.1
Born abroad	1,807 ±296	2.8% ±0.5	6.1% ±0.2	14.1% ±<0.1
Naturalized citizens	1,309 ±304	2.0% ±0.5	3.7% ±0.1	7.4% ±<0.1
Not citizens	498 ±149	0.8% ±0.2	2.4% ±0.1	6.8% ±<0.1

Belknap County among the counties of New Hampshire

7th of 10 by population, July 2025. Every one is listed on the New Hampshire page.

Counties of New Hampshire near Belknap County in population, July 2025
County	July 2025	Change since 2020
Rockingham County	324,077	+3.0%
Merrimack County	158,078	+2.6%
Strafford County	135,043	+3.0%
Grafton County	93,225	+2.2%
Cheshire County	78,269	+2.3%
Belknap County	65,147	+2.1%
Carroll County	52,784	+5.0%
Sullivan County	43,961	+2.1%
Coos County	31,343	+0.3%

Elsewhere on the site

Rankings this appears in

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — counties and Puerto Rico municipios, with components of change and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026