Barnwell County, South Carolina

Barnwell County, South Carolina, had an estimated population of 20,653 in 2025 across 1,420 km². The figures below come from the US Census Bureau's population estimates and the American Community Survey, each shown with its own vintage and its rank among South Carolina's counties and nationally.

Population: 20,653; 2025 estimate
Area: 1,420 km²
Density: 15; per km²
Median income: $46,626; household, ACS 2024
Median age: 40.4; years, ACS 2024

How South Carolina's counties spread

Amenities & Infrastructure

Indicator	Value	In South Carolina	In the US
Households with Broadband2024	75.2%	42 / 46	2,994 / 3,144
Median Gross Rent2024	$740	40 / 46	2,523 / 3,137
Median Home Value2024	$106,000	38 / 46	2,845 / 3,139
Owner-Occupied Homes2024	70.9%	31 / 46	2,132 / 3,144
Vacant Homes2024	18.2%	13 / 46	1,007 / 3,144

Demography

Indicator	Value	In South Carolina	In the US
Aged 65 and Over2024	19.1%	29 / 46	1,820 / 3,144
American Indian & Alaska Native2024	0.1%	23 / 46	1,566 / 3,144
Asian, non-Hispanic2024	0.6%	24 / 46	1,544 / 3,144
Average Household Size2024people	2.5	12 / 46	1,201 / 3,144
Black, non-Hispanic2024	42.8%	15 / 46	139 / 3,144
Foreign-Born2024	2.4%	29 / 46	1,764 / 3,144
Hispanic or Latino2024	2.9%	35 / 46	2,253 / 3,144
Median Age2024years	40.4	31 / 46	1,899 / 3,144
Sex Ratio2024per 1,000 males	1,072	12 / 46	283 / 3,144
Speak a Language Other Than English2024	3.3%	34 / 46	2,234 / 3,144
Under 182024	23.7%	3 / 46	779 / 3,144
Veterans2024	7.1%	26 / 46	1,631 / 3,144
White, non-Hispanic2024	50.5%	31 / 46	2,713 / 3,144

Economy

Indicator	Value	In South Carolina	In the US
Below Poverty Line2024	25.0%	5 / 46	152 / 3,144
Households on SNAP2024	24.5%	3 / 46	170 / 3,144
Income Inequality2024index	0.494	9 / 46	325 / 3,144
Median Household Income2024	$46,626	36 / 46	2,914 / 3,143
Per Capita Income2024	$28,139	35 / 46	2,690 / 3,144
Unemployment Rate2024	7.0%	11 / 46	368 / 3,144

Education

Indicator	Value	In South Carolina	In the US
Bachelor's Degree or Higher2024	13.9%	41 / 46	2,863 / 3,144
High School or Higher2024	83.9%	37 / 46	2,658 / 3,144

Health Coverage

Indicator	Value	In South Carolina	In the US
No Health Insurance2024	12.2%	9 / 46	634 / 3,144
With a Disability2024	20.3%	5 / 46	565 / 3,144

Population & Density

Indicator	Value	In South Carolina	In the US
Population2025	20,653	38 / 46	1,796 / 3,144
Population Density2025/km²	15	37 / 46	1,673 / 3,144

Work & Commute

Indicator	Value	In South Carolina	In the US
Commute by Public Transit2024	2.2%	1 / 46	153 / 3,144
Households with No Vehicle2024	10.6%	6 / 46	193 / 3,144
Mean Commute Time2024minutes	27.2	21 / 46	897 / 3,143
Work from Home2024	4.2%	37 / 46	2,818 / 3,144

Other counties of South Carolina

Compare Barnwell County against every other county on a map, add layers and run a scatter — open the atlas. Sources and vintages for every figure on this page are listed under datasets, or browse all 3,144 counties.