Marlboro County, South Carolina
Located in South Carolina, Marlboro County has a population of 25,975 residents and a median age of 41.7 years, making it the #1,615 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 28.5%. The median home value is $82,000, and the median household income is $34,301, which is 54% below the national median.
Demographics
Marlboro County has a population of 25,975, making it the #1,615 most populous county in the US. The median age is 41.7 years, which is 7.2% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in Marlboro County is $34,301, ranking #3,127 out of 3,222 counties — 54.4% below the national median. The poverty rate is 28.5% and unemployment stands at 9.9%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in Marlboro County is $82,000 (-70.9% vs national). Renters pay a median of $689/mo and the homeownership rate is 63.0%.
Median Home Value Trend
Rankings →Household Type
Education
In Marlboro County, 9.0% of adults age 25+ hold a bachelor's degree or higher, which is 73.4% below the national average, ranking #3,199 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in Marlboro County is 69.1 years. 28.1% of adults report poor or fair health and 11.7% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
25.7% of adults in Marlboro County smoke , 46.0% are obese , and 16.3% report excessive drinking. The drug overdose death rate is 26.9 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in Marlboro County is 24.4 per 100,000 and the suicide rate is 13.0 per 100,000. Motor vehicle deaths occur at a rate of 35.8 per 100,000.
Homicide Rate Trend
Families & Children
35.6% of children in Marlboro County live in poverty and the infant mortality rate is 11.5 per 1,000 live births. The teen birth rate is 38.1 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in Marlboro County is 54.9%. The mean commute time is 29.1 min, which is 5.5% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, Marlboro County voted Democratic with a margin of 2.4%. The vote was 50.6% Dem / 48.2% Rep. Compared to 2020, the margin shifted 8.5 toward Republicans .
Vote Share Over Time
About Marlboro County, South Carolina
Marlboro County, South Carolina has a total population of 25,975, making it the 1,615th most populous county in the United States. The median age in Marlboro County is 41.7 years, which is 7.2% above the national median of 38.9 years.
The median household income in Marlboro County is $34,301, which ranks #3,127 of 3,222 counties nationwide. This is 54.4% below the national median of $75,149. The poverty rate is 28.5%, higher than the national rate of 12.6%. The unemployment rate stands at 9.9%.
The median home value in Marlboro County is $82,000, 70.9% below the national median. Renters in Marlboro County pay a median gross rent of $689 per month. The homeownership rate is 63.0%, compared to the national rate of 64.4%.
In Marlboro County, 9.0% of residents aged 25 and older hold a bachelor's degree or higher, 73.4% below the national average of 33.7%. Health insurance coverage stands at 87.4% of the population. The average commute time for workers is 29.1 min.
Marlboro County is a diverse community. The largest racial or ethnic group is Black (non-Hispanic) at 47.7% of the population, followed by White (non-Hispanic) (38.2%) and Two or More Races (7.2%).
All data for Marlboro County, South Carolina comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.