Harbor Island, SC
Population 310 · South Carolina
About Harbor Island, SC
Harbor Island is a small community in South Carolina with a population of 310 residents. The median household income is $100,250 per year, which is above the national average. The median age in Harbor Island is 69.5 years.
Housing in Harbor Island has a median home value of $284,500 and median monthly rent of $0. Of the 478 total housing units, the majority are owner-occupied, with 123 owner-occupied and 23 renter-occupied units.
The unemployment rate in Harbor Island is 0.0% and the poverty rate is 4.2%. 80.8% of residents hold a bachelor's degree or higher. The average commute time is 26.6 minutes.
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.
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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 Census data.
What is the median household income in Harbor Island?
The median household income in Harbor Island, SC is $100,250 per year.
What is the median home value in Harbor Island?
The median home value in Harbor Island, SC is $284,500.
What is the average rent in Harbor Island?
The median monthly rent in Harbor Island, SC is $0.
What is the unemployment rate in Harbor Island?
The unemployment rate in Harbor Island, SC is 0.0%.