Demographics of Seabrook town, New Hampshire

Seabrook town, New Hampshire had 8,430 people on July 1, 2025, by the Census Bureau’s estimate: +27 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Seabrook town, in four figures

8,430
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 8,427 ±18.; +0.3%
Change since July 2020: +27 people.; 54.0 ±1.9
Median age: ACS 2020–⁠2024.; $84,349 ±$15,363
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. The Bureau publishes no births, deaths or migration for a town, so the change is the difference between one July estimate and the next.

Seabrook town, New Hampshire's population grew 0.3% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Seabrook town, 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

Seabrook town, New Hampshire's population grew 0.3% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Seabrook town, 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	8,403	100.0	100.0
2021	8,467	100.8	100.2
2022	8,434	100.4	100.7
2023	8,410	100.1	101.6
2024	8,436	100.4	102.5
2025	8,430	100.3	103.1

Population of Seabrook town, New Hampshire on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	8,403	—
2021	8,467	+64
2022	8,434	−33
2023	8,410	−24
2024	8,436	+26
2025	8,430	−6

Age, 2020–2024

The median age is 54.0 ±1.9: for men 52.8 ±10.0 and for women 55.3 ±4.0. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Seabrook town by age, ACS 2020–2024
Age	People	Share	New Hampshire	United States
Under 5	253 ±90	3.0% ±1.1	4.5% ±<0.1	5.6% ±<0.1
5 to 17	996 ±247	11.8% ±2.9	13.7% ±0.2	16.3% ±<0.1
18 to 24	368 ±137	4.4% ±1.6	8.7% ±0.2	9.1% ±<0.1
25 to 44	1,841 ±329	21.8% ±3.9	25.0% ±0.2	26.9% ±<0.1
45 to 64	2,314 ±374	27.5% ±4.4	27.9% ±0.2	24.8% ±<0.1
65 and over	2,655 ±424	31.5% ±5.0	20.1% ±0.2	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $84,349 ±$15,363, and income per person $48,681 ±$6,059, 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 Seabrook town by income, ACS 2020–2024
Household income	Households	Share	New Hampshire	United States
Under $25,000	757 ±218	19.8% ±5.6	10.4% ±0.3	14.6% ±<0.1
$25,000 to $49,999	575 ±174	15.0% ±4.5	13.4% ±0.4	16.7% ±<0.1
$50,000 to $74,999	392 ±130	10.3% ±3.3	14.3% ±0.4	15.5% ±<0.1
$75,000 to $99,999	411 ±150	10.8% ±3.9	12.4% ±0.3	12.6% ±<0.1
$100,000 to $149,999	757 ±198	19.8% ±5.1	20.0% ±0.5	17.5% ±<0.1
$150,000 to $199,999	379 ±123	9.9% ±3.2	12.7% ±0.3	9.6% ±<0.1
$200,000 or more	552 ±179	14.4% ±4.6	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 Seabrook town by age, ACS 2020–2024
Age	Below poverty	Rate	New Hampshire	United States
All ages	1,021 ±313	12.1% ±3.7	7.2% ±0.3	12.5% ±0.1
Under 18	75 to 381	6.9% to 30.0%	7.9% ±0.6	16.1% ±0.1
18 to 59	384 ±133	10.1% ±3.2	6.8% ±0.3	11.6% ±0.1
60 and over	409 ±189	12.2% ±5.4	7.7% ±0.4	11.0% ±<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%.

Housing, 2020–2024

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Housing in Seabrook town, ACS 2020–2024
Measure	Seabrook town	New Hampshire	United States
Housing units	4,151 ±241	648,472 ±247	143,775,355 ±10,234
Occupied	92.1% ±7.5	85.7% ±0.3	89.9% ±0.1
Vacant	7.9% ±2.8	14.3% ±0.3	10.1% ±0.1
Owner occupied	68.2% ±3.0	72.8% ±0.4	65.2% ±0.3
Renter occupied	31.8% ±5.8	27.2% ±0.4	34.8% ±0.1
Median home value	$443,500 ±$40,438	$402,500 ±$2,808	$332,700 ±$236
Median gross rent	$1,542 ±$174	$1,491 ±$15	$1,413 ±$2
Median year built	1986 ±4	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 Seabrook town by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	New Hampshire	United States
Hispanic or Latino	128 to 670	1.5% to 8.0%	4.7% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	7,354 ±398	87.3% ±4.7	86.9% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 208	0% to 2.5%	1.3% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	15 to 153	0.2% to 1.8%	2.6% ±0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 17	0% to 0.2%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 17	0% to 0.2%	< 0.1%	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 17	0% to 0.2%	0.4% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	231 to 763	2.7% to 9.1%	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 Seabrook town by place of birth and citizenship, ACS 2020–2024
Born	People	Share	New Hampshire	United States
Born in the state	1,879 ±379	22.3% ±4.5	40.8% ±0.4	57.3% ±<0.1
Born in another state	6,253 ±388	74.2% ±4.6	51.8% ±0.4	26.9% ±<0.1
Born a citizen outside the states	0 to 129	0% to 1.5%	1.3% ±0.1	1.7% ±<0.1
Born abroad	90 to 382	1.1% to 4.5%	6.1% ±0.2	14.1% ±<0.1
Naturalized citizens	18 to 154	0.2% to 1.8%	3.7% ±0.1	7.4% ±<0.1
Not citizens	15 to 285	0.2% to 3.4%	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%.

Seabrook town among the places and towns of New Hampshire

45th of 85 places and towns of 5,000 or more by the survey’s 2020–2024 count. Every one is listed on the New Hampshire page.

Places of New Hampshire near Seabrook town in population, ACS 2020–2024
Place	ACS 2020–⁠2024
Milford CDP	8,956 ±771
Franklin city	8,799 ±26
Hollis town	8,603 ±18
Litchfield town	8,499 ±33
Hanover CDP	8,479 ±350
Seabrook town	8,427 ±18
Bow town	8,335 ±31
Plaistow town	7,861 ±23
Gilford town	7,830 ±22
Stratham town	7,754 ±25
Hudson CDP	7,469 ±787

Rankings this appears in

No. 1 Places in New Hampshire by median age
No. 1 Places in New Hampshire by poverty rate
No. 11 Places in New Hampshire by median rent
No. 19 Places in New Hampshire by median home value
No. 19 Places in New Hampshire by per capita income
No. 33 Places in New Hampshire by median household income

Sources

Census Bureau population estimates — incorporated places and New England towns — 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 — incorporated places and New England towns 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