Harbor Island, SC
Population 310 · South Carolina
About Harbor Island, SC
Harbor Island is a small community located in South Carolina with a population of 310 residents according to the latest US Census Bureau American Community Survey data. The median household income is $100,250 per year, which is 33% above the national median of $75,149. The median age of 69.5 years is notably older the US median age of 38.9 years, suggesting a more established community with a higher proportion of long-term residents.
Housing Market Overview
The housing market in Harbor Island features a median home value of $284,500, which is 16% above the national median of $244,900. This positions Harbor Island in a moderately priced market relative to the rest of the country. Median monthly rent is $0, 100% below the national average of $1,163/month. Of the 478 total housing units, 84% are owner-occupied (123 units) and 16% are renter-occupied (23 units). The high homeownership rate suggests a stable, established residential community.
Economy & Employment
The local economy in Harbor Island shows an unemployment rate of 0.0%, which is lower than the national rate of 3.7%, indicating a relatively strong job market. The poverty rate stands at 4.2%, below the national average of 12.4%, reflecting generally favorable economic conditions. Workers in Harbor Island have an average one-way commute time of 26.6 minutes.
Education & Demographics
80.8% of Harbor Island residents aged 25 and older hold a bachelor's degree or higher, compared to the national average of 33.7%. This significantly higher educational attainment rate often correlates with access to knowledge-economy jobs and higher household incomes. The community's demographic composition includes 0.0% White, 2.9% Hispanic or Latino, 0.0% Black or African American, and 0.0% Asian residents, with 3.5% of the population being foreign-born.
How Harbor Island Ranks in South Carolina
Cost of Living in Harbor Island, SC
Compared to national averages, Harbor Island has a median household income of $100,250 (33% above the national median of $75,149). Home values average $284,500, which is 16% above the national median. Monthly rent at $0 is 100% below the US average of $1,163. Within South Carolina, Harbor Island's income is 71% above the state average of $58,738, and home values are 41% above the state median of $202,187.
Why Live in Harbor Island, SC?
Harbor Island offers a strong local economy with a median household income of $100,250, well above the national average, and rent that’s lower than the national average at $0/month, and a strong job market with an unemployment rate of just 0.0%. Additionally, the city features a well-educated community where 80.8% of residents hold a bachelor’s degree or higher, and a low poverty rate of 4.2%, better than the national average.
Harbor Island has a population of 310 with a median age of 69.5 years. Compare Harbor Island with other cities to see how it stacks up, or explore all cities in South Carolina.
Similar Cities Near Harbor Island
Cities in South Carolina with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| McConnells | 312 | $80,833 | $236,700 | Compare |
| Gillisonville | 317 | $0 | $0 | Compare |
| Trenton | 320 | $52,986 | $153,100 | Compare |
| Reevesville | 295 | $72,500 | $0 | Compare |
| Perry | 333 | $35,179 | $90,500 | Compare |
| South Union | 333 | $0 | $0 | Compare |
| Salley | 335 | $34,189 | $212,500 | Compare |
| Ward | 284 | $55,625 | $115,600 | Compare |
Demographics
Racial & Ethnic Composition
Economy & Education
Housing
Other Cities in South Carolina
Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
Compare Harbor Island With Other Cities
Frequently Asked Questions about Harbor Island
What is the population of Harbor Island, SC?
The population of Harbor Island, SC is 310 according to the latest US Census Bureau American Community Survey estimates. This makes it a small community in South Carolina.
What is the median household income in Harbor Island?
The median household income in Harbor Island, SC is $100,250 per year, which is 33% above the national median of $75,149.
What is the median home value in Harbor Island?
The median home value in Harbor Island, SC is $284,500, which is 16% above the national median of $244,900. The majority of housing units are owner-occupied.
What is the average rent in Harbor Island?
The median monthly rent in Harbor Island, SC is $0, which is 100% below the national average of $1,163/month.
What is the unemployment rate in Harbor Island?
The unemployment rate in Harbor Island, SC is 0.0%, compared to the national average of 3.7%. This lower-than-average rate suggests a relatively healthy local job market.
Is Harbor Island, SC a good place to live?
Harbor Island offers above-average incomes, a competitive housing market, and a strong job market. With a population of 310 and a median age of 69.5, the city appeals to established professionals and retirees.
How educated is Harbor Island, SC?
80.8% of residents in Harbor Island aged 25 and older hold a bachelor's degree or higher, compared to the national average of 33.7%. This above-average educational attainment often reflects a knowledge-based local economy.
What is the cost of living in Harbor Island?
Key cost-of-living indicators for Harbor Island, SC: median home value is $284,500 (16% above national), median rent is $0/month, and median household income is $100,250. The home-value-to-income ratio is 2.8x, indicating relatively affordable housing relative to local incomes.
What is the poverty rate in Harbor Island?
The poverty rate in Harbor Island, SC is 4.2%, compared to the national average of 12.4%. This below-average poverty rate reflects generally favorable economic conditions in the community.
How diverse is Harbor Island, SC?
Harbor Island's population is 0.0% White, 2.9% Hispanic or Latino, 0.0% Black or African American, 0.0% Asian, and 0.0% two or more races. 3.5% of residents are foreign-born.