Blenheim, South Carolina Demographics & Population 2026
During the 2020–2024 ACS period, Blenheim, South Carolina had a total population of 82, the 453rd largest town in South Carolina, with a median household income of $49,167, which is 29% lower than the state average. The poverty rate is 21.5%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Blenheim Quick Facts
How Blenheim Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 46 | 82 | +78.3% |
| Median household income | $66,667 | $49,167 | -26.2% |
How Blenheim Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 55 | National average: 61
Education
Educational Attainment (Adults 25+)
Blenheim Rankings in South Carolina
Explore South Carolina Rankings
Other Cities in Marlboro County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Bennettsville | 7,751 | $37,115 | 28.4% | $92,100 |
| McColl | 2,200 | $26,638 | 41.9% | $56,300 |
| Clio | 840 | $36,359 | 29.2% | $106,600 |
| Wallace | 665 | $32,703 | 14.4% | $97,600 |
| Tatum | 80 | $53,125 | 1.3% | $86,700 |
Cities Similar to Blenheim
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Rains | 84 | N/A | N/A | 0.0% | 0.0% |
| Tatum | 80 | $53,125 | $86,700 | 2.2% | 1.3% |
| Bradley | 90 | N/A | N/A | 0.0% | 33.3% |
| Parksville | 82 | $40,625 | $200,000 | 9.0% | 11.0% |
| Green Sea | 71 | N/A | N/A | 0.0% | 0.0% |
A note before these figures: with a population of 82, Blenheim's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Blenheim is a small community located in South Carolina, within Marlboro County. The total population is 82. It ranks as the 453rd most populous out of 474 Census-designated places in South Carolina.
Age Demographics
The median age in Blenheim is 40.9 years. This is 2% higher than the state median of 40.2 years. Only 13.4% of residents are under 18, indicating fewer families with children. 11.0% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Blenheim is $49,167. This is 29% lower than the state median of $69,324. It is also 39% lower than the national median of $80,734. The poverty rate stands at 21.5%. This is 53% higher than the state poverty rate of 14.1%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The survey records no unemployed residents in Blenheim, which reflects the size of the sample rather than a labor market without joblessness. 65.0% of occupied housing units are owner-occupied. This homeownership rate is 10% lower than the state average of 71.9%.
Race & Ethnicity
The largest racial or ethnic group in Blenheim is White (non-Hispanic), making up 68.3% of the population. Black or African American residents account for 23.2%.
Education
15.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 52% lower than the state rate of 32.1%. Nationally, 35.7% of adults hold at least a bachelor's degree. No surveyed resident aged 25 or older reported leaving school before earning a high school diploma, though a rate of exactly 100% reflects the limits of a small sample.
Data Sources & Methodology
All demographic data for Blenheim, South Carolina is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against South Carolina state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 474 Census-designated places in South Carolina. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Blenheim, South Carolina?
Blenheim, South Carolina has a population of 82 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Blenheim, SC?
The median household income in Blenheim is $49,167, which is 39% lower than the national median of $80,734.
What is the poverty rate in Blenheim, SC?
The poverty rate in Blenheim is 21.5%. This means approximately 17 residents live below the federal poverty line.
What is the racial makeup of Blenheim, South Carolina?
Blenheim's population is 68.3% White, 23.2% Black, 0.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Blenheim, SC?
The Census Bureau does not publish a reliable median home value estimate for Blenheim — there are too few owner-occupied homes in the ACS sample. The national median is $332,700.
How educated is Blenheim, South Carolina?
15.5% of adults (25+) in Blenheim hold a bachelor's degree or higher, and 0.0% hold a graduate or professional degree.