Sullivan's Island

County:: Charleston County
County Seat:: No
Area (mi²):: 2.498
State:: South Carolina

Sullivan's Island is a town located in Charleston County, South Carolina. Sullivan's Island has a 2025 population of 1,938. Sullivan's Island is currently growing at a rate of 0.41% annually and its population has increased by 2.11% since the most recent census, which recorded a population of 1,898 in 2020.

The average household income in Sullivan's Island is $309,339 with a poverty rate of 8.32%. The median age in Sullivan's Island is 52.9 years: 48.3 years for males, and 57.7 years for females.

Demographics

The racial composition of Sullivan's Island includes 98.87% White, and smaller percentages for Two or more races, Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

Other race

Race	Population	Percentage (of total)
White	2,103	98.87%
Two or more races	16	0.75%
Asian	8	0.38%
Black or African American	0	0%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%
Other race	0	0%

Sullivan's Island Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Sullivan's Island's average per capita income is $85,903. Household income levels show a median of $179,614. The poverty rate stands at 8.32%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Families	$250,001	$388,447
Married Families	$250,001	-
Households	$179,614	$309,339
Non Families	$122,143	$133,383

$85,903

Average Income

$179,614

Median Household Income

8.32%

Poverty Rate