Harbor Island Flag

Harbor Island

County:
Beaufort County
County Seat:
No
Area (mi²):
1.027

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.

346
Total Population
337
Density (mi²)
23 7.12%
Growth

Harbor Island Population

Harbor Island Population

Data after 2023 is projected based on recent change

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

White (97.1%)

Two or more races (2.9%)

Race
Population
Percentage (of total)
White30197.1%
Two or more races92.9%

Harbor Island Marital Status

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

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

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)