Demographics of Sullivan County, New Hampshire

Sullivan County, New Hampshire had 43,961 people on July 1, 2025, by the Census Bureau’s estimate: +888 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.

Sullivan County, in four figures

43,961
Population: July 1, 2025, Vintage 2025 estimate.; +2.1%
Change since July 2020: +888 people.; 47.0 ±0.5
Median age: ACS 2020–⁠2024.; $80,858 ±$3,824
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.

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

The July 1 estimate of Sullivan 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

Sullivan County, New Hampshire's population grew 2.1% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Sullivan 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	43,073	100.0	100.0
2021	43,619	101.3	100.2
2022	43,889	101.9	100.7
2023	44,008	102.2	101.6
2024	43,924	102.0	102.5
2025	43,961	102.1	103.1

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Population of Sullivan 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	43,073	+8	−31	0	+33
2021	43,619	+546	−164	+17	+711
2022	43,889	+270	−177	+35	+405
2023	44,008	+119	−178	+64	+235
2024	43,924	−84	−187	+6	+98
2025	43,961	+37	−192	−2	+232

Age, 2020–2024

The median age is 47.0 ±0.5: for men 46.0 ±0.7 and for women 48.0 ±0.7. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Sullivan County by age, ACS 2020–2024
Age	People	Share	New Hampshire	United States
Under 5	1,923 ±128	4.4% ±0.3	4.5% ±<0.1	5.6% ±<0.1
5 to 17	5,834 ±384	13.3% ±0.9	13.7% ±0.2	16.3% ±<0.1
18 to 24	2,863 ±352	6.5% ±0.8	8.7% ±0.2	9.1% ±<0.1
25 to 44	10,178 ±444	23.3% ±1.0	25.0% ±0.2	26.9% ±<0.1
45 to 64	12,629 ±573	28.9% ±1.3	27.9% ±0.2	24.8% ±<0.1
65 and over	10,288 ±592	23.5% ±1.4	20.1% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $80,858 ±$3,824, and income per person $44,514 ±$3,173, 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 Sullivan County by income, ACS 2020–2024
Household income	Households	Share	New Hampshire	United States
Under $25,000	2,335 ±356	14.1% ±2.1	10.4% ±0.3	14.6% ±<0.1
$25,000 to $49,999	2,648 ±413	15.9% ±2.4	13.4% ±0.4	16.7% ±<0.1
$50,000 to $74,999	2,863 ±412	17.2% ±2.4	14.3% ±0.4	15.5% ±<0.1
$75,000 to $99,999	2,333 ±334	14.0% ±2.0	12.4% ±0.3	12.6% ±<0.1
$100,000 to $149,999	3,093 ±369	18.6% ±2.2	20.0% ±0.5	17.5% ±<0.1
$150,000 to $199,999	1,692 ±283	10.2% ±1.7	12.7% ±0.3	9.6% ±<0.1
$200,000 or more	1,654 ±313	10.0% ±1.9	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 Sullivan County by age, ACS 2020–2024
Age	Below poverty	Rate	New Hampshire	United States
All ages	4,344 ±678	10.1% ±1.6	7.2% ±0.3	12.5% ±0.1
Under 18	899 ±236	12.1% ±3.1	7.9% ±0.6	16.1% ±0.1
18 to 59	2,342 ±465	10.7% ±2.1	6.8% ±0.3	11.6% ±0.1
60 and over	1,103 ±264	8.1% ±1.9	7.7% ±0.4	11.0% ±<0.1

Housing, 2020–2024

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Housing in Sullivan County, ACS 2020–2024
Measure	Sullivan County	New Hampshire	United States
Housing units	21,958 ±104	648,472 ±247	143,775,355 ±10,234
Occupied	75.7% ±2.1	85.7% ±0.3	89.9% ±0.1
Vacant	24.3% ±2.1	14.3% ±0.3	10.1% ±0.1
Owner occupied	75.4% ±2.1	72.8% ±0.4	65.2% ±0.3
Renter occupied	24.6% ±2.6	27.2% ±0.4	34.8% ±0.1
Median home value	$268,700 ±$9,374	$402,500 ±$2,808	$332,700 ±$236
Median gross rent	$1,211 ±$60	$1,491 ±$15	$1,413 ±$2
Median year built	1974 ±1	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 Sullivan County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	New Hampshire	United States
Hispanic or Latino	911 ±0	2.1% ±<0.1	4.7% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	39,974 ±369	91.4% ±0.8	86.9% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	309 ±98	0.7% ±0.2	1.3% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	34 to 216	0.1% to 0.5%	2.6% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	2 to 40	< 0.1% to 0.1%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 20	0% to < 0.1%	< 0.1%	0.2% ±<0.1
Some other race alone, not Hispanic	13 to 287	< 0.1% to 0.7%	0.4% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	2,217 ±371	5.1% ±0.8	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 Sullivan County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	New Hampshire	United States
Born in the state	22,937 ±967	52.5% ±2.2	40.8% ±0.4	57.3% ±<0.1
Born in another state	19,502 ±946	44.6% ±2.2	51.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	150 to 536	0.3% to 1.2%	1.3% ±0.1	1.7% ±<0.1
Born abroad	933 ±244	2.1% ±0.6	6.1% ±0.2	14.1% ±<0.1
Naturalized citizens	712 ±192	1.6% ±0.4	3.7% ±0.1	7.4% ±<0.1
Not citizens	95 to 347	0.2% to 0.8%	2.4% ±0.1	6.8% ±<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%.

Sullivan County among the counties of New Hampshire

9th of 10 by population, July 2025. Every one is listed on the New Hampshire page.

Counties of New Hampshire near Sullivan County in population, July 2025
County	July 2025	Change since 2020
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