Seabrook Island, SC demographics:
population, income, and more

Total population
2,204
4.6% year-over-year change
Median household income
$127,500/yr
2.4% year-over-year change
Housing units
2,574
2.1% year-over-year change

Seabrook Island population

How many people live in Seabrook Island

Seabrook Island is home to 2,204 residents, according to the most recent Census data. Gender-wise, 48.9% of Seabrook Island locals are male, and 51.1% are female.

Total population
2,204
4.6% year-over-year change
Gender ratio
Male
48.9%
1,077
Female
51.1%
1,127
Value Percent YoY change
Male 1,077 48.9% 4.9%
Female 1,127 51.1% 4.3%
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 Island is 69, with the population distributed as follows: about 0.3% are children under 15, then 0.1% are in the 15 to 24 age group. Adults between 25 and 44 make up 4.8% of the population, while another 31.3% fall into the 45 to 64 bracket. Finally, around 63.5% are 65 or older.

Median age
68.9
Age breakdown
Under 15
0.3%
15 to 24
0.1%
25 to 44
4.8%
45 to 64
31.3%
Over 65
63.5%
Value Percent YoY change
Under 15 7 0.3% N/A
15 to 24 2 0.1% -77.8%
25 to 44 106 4.8% 35.9%
45 to 64 690 31.3% 2.2%
Over 65 1,399 63.5% 4.0%
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 Island, 95.6% of the population are US-born citizens, while 4.3% have gained naturalized citizenship. At the same time, 0.1% of residents are non-citizens. As for race, 96.4% of locals are Caucasian, 0.2% are African American and 0.6% have Asian roots. There’s also a share of 2.8% that includes residents with two or more races.

Citizenship
U.S.-born citizens
95.6%
Non-U.S.-born citizens
4.3%
Non-citizens
0.1%
Value Percent YoY change
U.S.-born citizens 2,106 95.6% 4.8%
Non-U.S.-born citizens 95 4.3% 3.3%
Non-citizens 3 0.1% -50.0%
Racial breakdown
White
96.4%
Black or African American
0.2%
American Indian and Alaska Native
0%
Asian
0.6%
Native Hawaiian and other Pacific Islander
0%
Two or more races
2.8%
Other
0%
Value Percent
White 2,124 96.4%
Black or African American 5 0.2%
American Indian and Alaska Native 1 0%
Asian 13 0.6%
Two or more races 61 2.8%

Households in Seabrook Island

A peek inside Seabrook Island households

Seabrook Island has 1,250 households, with an average of 2 members in each. Of these, 71.9% are families, while the remaining 28.1% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
1,250
5.7% year-over-year change
Average people per household
2
Non-family households
351
Family households
899
Value Percent YoY change
Non-family households 351 28.1% 8.3%
Family households 899 71.9% 4.7%
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 Island

The housing landscape of Seabrook Island

Seabrook Island's housing consists of 2,574 units, with 58.2% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 14% and offer a more compact, shared living style.

Housing units
2,574
2.1% year-over-year change
Housing types
Value Percent
1 unit, detached 1,497 58.2%
1 unit, attached 360 14%
2 units 36 1.4%
3 or 4 units 69 2.7%
5 to 9 units 307 11.9%
10 to 19 units 224 8.7%
20 to 49 units 63 2.4%
50 or more units 18 0.7%
Homes built since 2020
64
77.8% year-over-year change

The age of buildings in Seabrook Island

In Seabrook Island, the median construction year is 1988. Most development happened in the second half of the 20th century. Then, 18% of homes were added from 2000 to 2009, 9.2% between 2010 and 2019, and 2.5% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 10 0.4% 0.0%
Built between 1950 and 1959 8 0.3% N/A
Built between 1960 and 1969 5 0.2% 0.0%
Built between 1970 and 1979 609 23.7% -3.9%
Built between 1980 and 1989 865 33.6% -1.7%
Built between 1990 and 1999 313 12.2% 4.0%
Built between 2000 and 2009 462 18% 4.3%
Built between 2010 and 2019 238 9.2% 11.7%
Built in 2020 or later 64 2.5% 77.8%
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 Island occupancy rates

Out of the 1,250 occupied housing units in Seabrook Island, 95.8% are owner-occupied, while 4.2% are lived in by tenants. Meanwhile, 51.4% of all homes on the local market sit vacant.

Occupied housing units
1,250
5.7% year-over-year change
Occupancy breakdown
Renter occupied
53
Owner occupied
1,197
Value Percent YoY
change
Renter occupied 53 4.2% -22.1%
Owner occupied 1,197 95.8% 7.3%
Unoccupied housing units
51.4%
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 Island housing costs

Housing costs in Seabrook Island come to a median of $2,190 per month, while tenants specifically pay a median gross rent of $3,501.

Median housing costs per month
$2,190/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 Island
$3,501/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 Island

Seabrook Island education at a glance

About 5.5% of the population in Seabrook Island went to high school, while 9.4% pursued college studies. Another 6.5% earned an associate degree and 40.2% hold a bachelor’s. Meanwhile, 38% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 9 0.4% 0.0%
High school diploma 120 5.5% 34.8%
College diploma 206 9.4% 18.4%
Associate degree 142 6.5% 34.0%
Bachelor's degree 884 40.2% 4.6%
Graduate degree 836 38% -4.7%
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 Island

How much people earn in Seabrook Island

The average annual household income in Seabrook Island was $229,809 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +10.7% change from the previous year. At the same time, the median income stood at $127,500, reflecting a +2.4% shift over the same period.

Average household income in Seabrook Island
$229,809/year
10.7% year-over-year change
Median household income in Seabrook Island
$127,500/year
2.4% year-over-year change

Seabrook Island income by age

In Seabrook Island, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $168,750. Those with someone between 45 and 64 in charge, often well established professionally, earn $122,326 overall. Overall, 95.6% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $168,750 N/A
45 - 64 $122,326 2.4%
Over 65 $126,875 -8.0%
Above poverty level
2,107
Below poverty level
97
Value Percent YoY
change
Above poverty level 2,107 95.6% 4.8%
Below poverty level 97 4.4% 0.0%

Employment in Seabrook Island

Workforce and job types in Seabrook Island

The job market in Seabrook Island is powered by 751 working residents, spread across a range of industries and roles. 94.9% of the working population are employed in professional or administrative positions, while 5.1% are in hands-on or service-based jobs. Also, 39.6% run their own businesses, 48.1% are employed by private companies, and 4.9% work in the public sector.

Workforce demographics

Working population
751
9.6% year-over-year change
White collar
713
Blue collar
38
Value Percent YoY change
White collar 713 94.9% 6.6%
Blue collar 38 5.1% 137.5%
Employer type
Self employees
39.6%
Private companies
48.1%
Governmental workers
4.9%
Not for profit companies
7.5%
Value Percent YoY change
Self employees 297 39.6% 11.7%
Private companies 361 48.1% 11.4%
Governmental workers 37 4.9% -19.6%
Not for profit companies 56 7.5% 14.3%

Transportation in Seabrook Island

How people get around in Seabrook Island

Commuting methods vary: 49.9% of residents travel by personal vehicle and 2.3% 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 371 49.9% 7.5%
Taxicab 8 1.1% N/A
Bicycle 10 1.3% 233.3%
Walk 17 2.3% -34.6%
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 Island by zipcode?

Zipcode Population Number of households Median income Average income
29487 2,703 1,059 $105,592 $161,967
29455 27,576 12,249 $121,372 $178,217

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FAQs about Seabrook Island demographics 

What is the total population of Seabrook Island?

Seabrook Island has a total population of 2,204 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 +4.6% compared to a year ago.

What is the gender ratio in Seabrook Island?

The gender ratio in Seabrook Island is as follows:
  • 48.9% males (1,077 residents)
  • 51.1% females (1,127 residents)

What is the median age in Seabrook Island?

The median age in Seabrook Island is 68.9.

What is the age distribution of the population in Seabrook Island?

The age distribution in Seabrook Island is as follows:
  • Under 15: 0.3% (7 residents)
  • Ages 15-24: 0.1% (2 residents)
  • Ages 25-44: 4.8% (106 residents)
  • Ages 45-64: 31.3% (690 residents)
  • Over 65: 63.5% (1,399 residents)

What is the racial and ethnic makeup of Seabrook Island?

The racial and ethnic makeup of Seabrook Island is as follows:
  • White: 96.4% (2,124 residents)
  • Black or African American: 0.2% (5 residents)
  • American Indian and Alaska Native: 0% (1 residents)
  • Asian: 0.6% (13 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 2.8% (61 residents)
  • Other: 0% (0 residents)

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

U.S.-born citizens represent 95.6% of the population in Seabrook Island.

How many housing units are there in Seabrook Island?

There are 2,574 housing units in Seabrook Island, reflecting a +2.1% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

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

Seabrook Island has a total of 1,250 households, with an average of 2 people in each.

What is the median household income in Seabrook Island?

Seabrook Island has a median household income of $127,500, representing a +2.4% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Seabrook Island?

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

Job types:
  • White-collar workers: 94.9% (713 residents)
  • Blue-collar workers: 5.1% (38 residents)

Places of employment:
  • Self-employed: 39.6% (297 residents)
  • Private companies: 48.1% (361 residents)
  • Governmental workers: 4.9% (37 residents)
  • Not-for-profit companies: 7.5% (56 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