Harbor Island vs Seabrook

A side-by-side comparison of Harbor Island and Seabrook: population, income, housing, and more.

Harbor Island and Seabrook are places in South Carolina. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Seabrook has the higher population (959 vs 310 in Harbor Island). Harbor Island has the higher median household income ($100,250 vs $62,941 in Seabrook). Harbor Island has the higher median home value ($284,500 vs $27,200 in Seabrook).

Population, income & housing

	Harbor Island	Seabrook
Population	310	959
Median age	69.5 yrs	54.6 yrs
Median household income	$100,250	$62,941
Median home value	$284,500	$27,200
Housing units	478	494
Homeownership rate	84.2%	90.2%
Bachelor's degree or higher	80.8%	17.6%
Unemployment rate	0.0%	14.5%

Trends (ACS 5-year, 2019–2023)

	Harbor Island	Seabrook
Population	316 → 310 (-1.9%)	1,456 → 959 (-34.1%)
Median household income	$85,881 → $100,250 (+16.7%)	$44,615 → $62,941 (+41.1%)
Median home value	$404,400 → $284,500 (-29.6%)	—
Median gross rent	$1,717 → $1,455 (-15.3%)	—

Harbor Island

Population

316310

Median household income

$85,881$100,250

Median home value

$404,400$284,500

Median gross rent

$1,717$1,455

Seabrook

Population

1,456959

Median household income

$44,615$62,941

Age & race/ethnicity

Age distribution (share)

	Harbor Island	Seabrook
Under 5	0.0%	3.4%
5 to 17	0.0%	7.5%
18 to 24	1.0%	14.6%
25 to 34	0.0%	6.0%
35 to 44	0.0%	9.0%
45 to 54	16.5%	14.1%
55 to 64	11.0%	23.5%
65 to 74	60.6%	12.5%
75 and over	11.0%	9.4%

Race & ethnicity (share)

	Harbor Island	Seabrook
White (non-Hispanic)	97.1%	16.1%
Black or African American	0.0%	52.8%
American Indian & Alaska Native	0.0%	0.0%
Asian	0.0%	0.0%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.0%
Two or more races	2.9%	31.2%
Hispanic or Latino	0.0%	0.0%

Educational attainment (age 25+)

Share of adults 25+

	Harbor Island	Seabrook
No high school diploma	5.2%	20.9%
High school graduate	3.6%	36.1%
Some college or associate's	10.4%	25.4%
Bachelor's degree	42.0%	3.5%
Graduate or professional degree	38.8%	14.1%

Commute to work

How workers get to work (share)

	Harbor Island	Seabrook
Drove alone	75.4%	88.1%
Carpooled	0.0%	11.9%
Public transit	0.0%	0.0%
Walked	0.0%	0.0%
Bicycle	0.0%	0.0%
Worked from home	24.6%	0.0%
Other means	0.0%	0.0%

Housing

Units in structure (share)

	Harbor Island	Seabrook
1-unit, detached	60.3%	40.9%
1-unit, attached	15.7%	0.0%
2 to 4 units	2.7%	0.0%
5 to 19 units	20.5%	0.0%
20 or more units	0.8%	0.0%
Mobile home & other	0.0%	59.1%

Poverty & households

	Harbor Island	Seabrook
Poverty rate	4.2%	18.0%
Average household size	2.12	2.42
Mean commute (minutes)	27	30
Median year structure built	1995	1990