Harbor Island

County:: Beaufort County
County Seat:: No
Area (mi²):: 1.027
State:: South Carolina

Harbor Island is a CDP located in Beaufort County, South Carolina. Harbor Island has a 2025 population of 346. Harbor Island is currently growing at a rate of 7.12% annually and its population has increased by 9.49% since the most recent census, which recorded a population of 316 in 2020.

The average household income in Harbor Island is $88,075 with a poverty rate of 4.19%.The median age in Harbor Island is 69.5 years: 69.4 years for males, and 70.1 years for females.

Demographics

The racial composition of Harbor Island includes 97.1% White, and smaller percentages for Two or more races and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	301	97.1%
Two or more races	9	2.9%

Harbor Island Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Harbor Island's average per capita income is $0. Household income levels show a median of $100,250. The poverty rate stands at 4.19%.

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	$100,475	$94,465
Married Families	$100,475	-
Households	$100,250	$88,075
Non Families	-	$62,290

$0

Average Income

$100,250

Median Household Income

4.19%

Poverty Rate