Sullivan's Island Flag

Sullivan's Island

County Seat:
No
Area (mi²):
2.498

Sullivan's Island is a town located in Charleston County, South Carolina. Sullivan's Island has a 2025 population of 1,961 . Sullivan's Island is currently growing at a rate of 0.67% annually and its population has increased by 3.43% since the most recent census, which recorded a population of 1,896 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. For every 100 females there are 100.5 males.

2K
Total Population
785
Density (mi²)
13 0.67%
Growth

Sullivan's Island Population

Sullivan's Island Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Sullivan's Island includes 98.87% White, and smaller percentages for Two or more races, Asian and multiracial populations.

Population by Race

White (98.87%)

Two or more races (0.75%)

Asian (0.38%)

Race
Population
Percentage (of total)
White2,10398.87%
Two or more races160.75%
Asian80.38%

Sullivan's Island Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

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

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)