Seabrook Island vs Sullivan's Island

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

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

Sullivan's Island has the higher population (2,127 vs 2,107 in Seabrook Island). Sullivan's Island has the higher median household income ($179,614 vs $124,519 in Seabrook Island). Sullivan's Island has the higher median home value ($2,000,001 vs $899,600 in Seabrook Island).

Population, income & housing

	Seabrook Island	Sullivan's Island
Population	2,107	2,127
Median age	68.5 yrs	52.9 yrs
Median household income	$124,519	$179,614
Median home value	$899,600	$2,000,001
Median gross rent	$3,501	$2,402
Housing units	2,522	1,078
Homeownership rate	94.3%	84.6%
Bachelor's degree or higher	82.1%	87.2%
Unemployment rate	0.6%	1.7%

Trends (ACS 5-year, 2019–2023)

	Seabrook Island	Sullivan's Island
Population	1,762 → 2,107 (+19.6%)	2,203 → 2,127 (-3.4%)
Median household income	$108,875 → $124,519 (+14.4%)	$136,528 → $179,614 (+31.6%)
Median home value	$606,400 → $899,600 (+48.4%)	$1,773,100 → $2,000,001 (+12.8%)
Median gross rent	$3,281 → $3,501 (+6.7%)	$2,167 → $2,402 (+10.8%)

Seabrook Island

Population

1,7622,107

Median household income

$108,875$124,519

Median home value

$606,400$899,600

Median gross rent

$3,281$3,501

Sullivan's Island

Population

2,2032,127

Median household income

$136,528$179,614

Median home value

$1,773,100$2,000,001

Median gross rent

$2,167$2,402

Age & race/ethnicity

Age distribution (share)

	Seabrook Island	Sullivan's Island
Under 5	0.0%	2.0%
5 to 17	0.3%	15.5%
18 to 24	0.1%	4.2%
25 to 34	0.9%	5.1%
35 to 44	2.8%	11.7%
45 to 54	3.7%	15.1%
55 to 64	28.4%	19.7%
65 to 74	41.4%	19.6%
75 and over	22.4%	7.1%

Race & ethnicity (share)

	Seabrook Island	Sullivan's Island
White (non-Hispanic)	96.5%	97.0%
Black or African American	0.4%	0.0%
American Indian & Alaska Native	0.0%	0.0%
Asian	0.7%	0.4%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.0%
Two or more races	0.6%	0.6%
Hispanic or Latino	1.8%	2.1%

Educational attainment (age 25+)

Share of adults 25+

	Seabrook Island	Sullivan's Island
No high school diploma	0.4%	0.1%
High school graduate	4.2%	2.0%
Some college or associate's	13.3%	10.7%
Bachelor's degree	40.3%	41.2%
Graduate or professional degree	41.8%	45.9%

Commute to work

How workers get to work (share)

	Seabrook Island	Sullivan's Island
Drove alone	48.3%	81.1%
Carpooled	2.5%	1.4%
Public transit	0.0%	0.0%
Walked	3.8%	2.4%
Bicycle	0.4%	3.1%
Worked from home	44.9%	11.1%
Other means	0.0%	0.9%

Housing

Units in structure (share)

	Seabrook Island	Sullivan's Island
1-unit, detached	58.5%	88.9%
1-unit, attached	14.5%	0.2%
2 to 4 units	5.3%	3.6%
5 to 19 units	18.9%	3.4%
20 or more units	2.8%	3.1%
Mobile home & other	0.0%	0.8%

Poverty & households

	Seabrook Island	Sullivan's Island
Poverty rate	4.6%	8.3%
Average household size	1.78	2.60
Mean commute (minutes)	28	17
Median year structure built	1987	1984