County ProfileSC
Barnwell County
Population: 20,589 · 5 ZIP codes
Demographics
Source: U.S. Census Bureau (ACS/Decennial). Estimates vary by year.
People
Total population
20,589
People
Median age
40.4
Housing
Total households
8,116
Income
Median household income
$46,626
Housing
Total housing units
9,927
Employment
Employment rate
53.1%
Education
Bachelor’s degree or higher
13.9%
Healthcare
Insured population
87.8%
County details
Local time 02:19:05(ET)| Name | Barnwell |
|---|---|
| Total ZIP codes | 5total |
| ZIP codes (by type) | 3 Standard2 PO Box |
| Area code | 803, 839 |
| Timezone | Eastern Time (ET) |
| Coordinates | 33.2605516, -81.4342278 |
| Land area | 548.4 sq miles(1,420.3 km²) |
Map of Barnwell county, South Carolina with ZIP codes
Cities and Communities in Barnwell County
Compare the largest cities in Barnwell County by population, median income, and growth. Use the table below to analyze key demographic shifts across the region.
| City | Population | Median incomeHousehold | ZIP codes |
|---|---|---|---|
| Barnwell | 4,652 | $52,006 | 1ZIPs |
| Williston | 2,877 | $39,484 | 1ZIPs |
| Blackville | 1,923 | $21,742 | 1ZIPs |
| Hilda | 418 | $44,861 | 1ZIPs |
| Elko | 140 | $40,278 | 1ZIPs |
— Data unavailable or suppressed by the U.S. Census Bureau for areas with small sample sizes to protect individual privacy.
ZIP Codes in Barnwell County
Review the most populated postal areas across Barnwell County. Use the ranking below to compare resident density and demographic scales between the county's major zones.
Data Sources & Citations
The geographic and demographic information presented on this site is compiled from publicly available, authoritative sources, including:
- United States Census BureauDemographic, population, housing, and socioeconomic data sourced from Census Bureau datasets, including the Decennial Census and the American Community Survey (ACS).Census Data
- United States Postal Service (USPS)ZIP code classifications, delivery types, and postal designations used for reference purposes. USPS ZIP codes are intended for mail delivery and may not always align exactly with Census geographic boundaries.USPS