Seabrook Town, NH demographics:
population, income, and more

Total population
8,383
-1.5% year-over-year change
Median household income
$82,995/yr
-4.6% year-over-year change
Housing units
4,269
-1.8% year-over-year change

Seabrook population

How many people live in Seabrook

Seabrook is home to 8,383 residents, according to the most recent Census data. Gender-wise, 50.8% of Seabrook locals are male, and 49.2% are female.

Total population
8,383
-1.5% year-over-year change
Gender ratio
Male
50.8%
4,261
Female
49.2%
4,122
Value Percent YoY change
Male 4,261 50.8% -2.7%
Female 4,122 49.2% -0.2%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Seabrook is 54, with the population distributed as follows: about 11.2% are children under 15, then 7.8% are in the 15 to 24 age group. Adults between 25 and 44 make up 21.4% of the population, while another 28.2% fall into the 45 to 64 bracket. Finally, around 31.4% are 65 or older.

Median age
54.3
Age breakdown
Under 15
11.2%
15 to 24
7.8%
25 to 44
21.4%
45 to 64
28.2%
Over 65
31.4%
Value Percent YoY change
Under 15 937 11.2% 0.6%
15 to 24 656 7.8% -14.5%
25 to 44 1,791 21.4% 2.8%
45 to 64 2,366 28.2% -2.3%
Over 65 2,633 31.4% -0.4%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Seabrook, 96.5% of the population are US-born citizens, while 1.7% have gained naturalized citizenship. At the same time, 1.8% of residents are non-citizens. As for race, 87.4% of locals are Caucasian, 1.6% are African American and 1% have Asian roots. There’s also a share of 10.1% that includes residents with two or more races.

Citizenship
U.S.-born citizens
96.5%
Non-U.S.-born citizens
1.7%
Non-citizens
1.8%
Value Percent YoY change
U.S.-born citizens 8,091 96.5% -1.7%
Non-U.S.-born citizens 143 1.7% 13.5%
Non-citizens 148 1.8% -2.0%
Racial breakdown
White
87.4%
Black or African American
1.6%
American Indian and Alaska Native
0%
Asian
1%
Native Hawaiian and other Pacific Islander
0%
Two or more races
10.1%
Other
0%
Value Percent
White 7,323 87.4%
Black or African American 133 1.6%
Asian 83 1%
Two or more races 843 10.1%

Households in Seabrook

A peek inside Seabrook households

Seabrook has 3,841 households, with an average of 2 members in each. Of these, 58.3% are families, while the remaining 41.7% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
3,841
0.0% year-over-year change
Average people per household
2
Non-family households
1,601
Family households
2,240
Value Percent YoY change
Non-family households 1,601 41.7% 6.3%
Family households 2,240 58.3% -4.0%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Seabrook

The housing landscape of Seabrook

Seabrook's housing consists of 4,269 units, with 48.6% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 4.7% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 17.8% of the housing landscape.

Housing units
4,269
-1.8% year-over-year change
Housing types
Value Percent
1 unit, detached 2,075 48.6%
1 unit, attached 202 4.7%
2 units 418 9.8%
3 or 4 units 99 2.3%
5 to 9 units 93 2.2%
10 to 19 units 270 6.3%
20 to 49 units 178 4.2%
50 or more units 175 4.1%
Mobile home 760 17.8%
Homes built since 2020
47
88.0% year-over-year change

The age of buildings in Seabrook

In Seabrook, the median construction year is 1986. About 4.8% of homes were built before the 1940s, with another 4.1% going up by 1949. Most development happened in the second half of the 20th century. Then, 22% of homes were added from 2000 to 2009, 9.2% between 2010 and 2019, and 1.1% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 204 4.8% 17.2%
Built between 1940 and 1949 176 4.1% -16.2%
Built between 1950 and 1959 356 8.3% -17.4%
Built between 1960 and 1969 409 9.6% 11.4%
Built between 1970 and 1979 622 14.6% -13.8%
Built between 1980 and 1989 632 14.8% 38.9%
Built between 1990 and 1999 494 11.6% -9.4%
Built between 2000 and 2009 937 22% -8.8%
Built between 2010 and 2019 391 9.2% 0.0%
Built in 2020 or later 47 1.1% 88.0%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Seabrook occupancy rates

Out of the 3,841 occupied housing units in Seabrook, 67.7% are owner-occupied, while 32.3% are lived in by tenants. Meanwhile, 10% of all homes on the local market sit vacant.

Occupied housing units
3,841
0.0% year-over-year change
Occupancy breakdown
Renter occupied
1,241
Owner occupied
2,601
Value Percent YoY
change
Renter occupied 1,241 32.3% 11.8%
Owner occupied 2,601 67.7% -4.7%
Unoccupied housing units
10.0%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Seabrook housing costs

Housing costs in Seabrook come to a median of $1,628 per month, while tenants specifically pay a median gross rent of $1,513.

Median housing costs per month
$1,628/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Seabrook
$1,513/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Seabrook

Seabrook education at a glance

About 44.7% of the population in Seabrook went to high school, while 17.3% pursued college studies. Another 9.2% earned an associate degree and 20.6% hold a bachelor’s. Meanwhile, 6.1% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 150 2.1% -20.2%
High school diploma 3,201 44.7% -8.3%
College diploma 1,239 17.3% 13.8%
Associate degree 662 9.2% -2.6%
Bachelor's degree 1,472 20.6% 10.2%
Graduate degree 440 6.1% -16.4%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Seabrook

How much people earn in Seabrook

The average annual household income in Seabrook was $108,571 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a -3.9% change from the previous year. At the same time, the median income stood at $82,995, reflecting a -4.6% shift over the same period.

Average household income in Seabrook
$108,571/year
-3.9% year-over-year change
Median household income in Seabrook
$82,995/year
-4.6% year-over-year change

Seabrook income by age

In Seabrook, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $117,625. Those with someone between 45 and 64 in charge, often well established professionally, earn $105,227 overall. Overall, 87.9% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $117,625 7.2%
45 - 64 $105,227 14.6%
Over 65 $48,818 -13.2%
Above poverty level
7,320
Below poverty level
1,008
Value Percent YoY
change
Above poverty level 7,320 87.9% -2.7%
Below poverty level 1,008 12.1% 8.2%

Employment in Seabrook

Workforce and job types in Seabrook

77.1% of the working population are employed in professional or administrative positions, while 22.9% are in hands-on or service-based jobs. Also, 6.9% run their own businesses, 68.4% are employed by private companies, and 19.2% work in the public sector.

Workforce demographics

White collar
2,873
Blue collar
853
Value Percent YoY change
White collar 2,873 77.1% -0.7%
Blue collar 853 22.9% -9.1%
Employer type
Self employees
6.9%
Private companies
68.4%
Governmental workers
19.2%
Not for profit companies
5.5%
Value Percent YoY change
Self employees 258 6.9% -14.0%
Private companies 2,549 68.4% -0.6%
Governmental workers 715 19.2% -2.5%
Not for profit companies 204 5.5% -13.6%

Transportation in Seabrook

How people get around in Seabrook

Commuting methods vary: 95% of residents travel by personal vehicle and 3.4% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 3,080 95% -6.5%
Bus or trolleybus 11 0.3% -69.4%
Bicycle 40 1.2% 21.2%
Walk 111 3.4% 23.3%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Seabrook by zipcode?

Zipcode Population Number of households Median income Average income
03874 8,487 3,889 $82,995 $108,603

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FAQs about Seabrook demographics 

What is the total population of Seabrook?

Seabrook has a total population of 8,383 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by -1.5% compared to a year ago.

What is the gender ratio in Seabrook?

The gender ratio in Seabrook is as follows:
  • 50.8% males (4,261 residents)
  • 49.2% females (4,122 residents)

What is the median age in Seabrook?

The median age in Seabrook is 54.3.

What is the age distribution of the population in Seabrook?

The age distribution in Seabrook is as follows:
  • Under 15: 11.2% (937 residents)
  • Ages 15-24: 7.8% (656 residents)
  • Ages 25-44: 21.4% (1,791 residents)
  • Ages 45-64: 28.2% (2,366 residents)
  • Over 65: 31.4% (2,633 residents)

What is the racial and ethnic makeup of Seabrook?

The racial and ethnic makeup of Seabrook is as follows:
  • White: 87.4% (7,323 residents)
  • Black or African American: 1.6% (133 residents)
  • American Indian and Alaska Native: 0% ( residents)
  • Asian: 1% (83 residents)
  • Native Hawaiian and Other Pacific Islander: 0% ( residents)
  • Two or More Races: 10.1% (843 residents)
  • Other: 0% ( residents)

What percentage of the population in Seabrook are U.S.-born citizens?

U.S.-born citizens represent 96.5% of the population in Seabrook.

How many housing units are there in Seabrook?

There are 4,269 housing units in Seabrook, reflecting a -1.8% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Seabrook and what is the average household size?

Seabrook has a total of 3,841 households, with an average of 2 people in each.

What is the median household income in Seabrook?

Seabrook has a median household income of $82,995, representing a -4.6% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Seabrook?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 77.1% (2,873 residents)
  • Blue-collar workers: 22.9% (853 residents)

Places of employment:
  • Self-employed: 6.9% (258 residents)
  • Private companies: 68.4% (2,549 residents)
  • Governmental workers: 19.2% (715 residents)
  • Not-for-profit companies: 5.5% (204 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025