How many people live in Marlboro County, SC?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 25,500 people living in Marlboro County, SC. That makes Marlboro County the 36th-most populous county in South Carolina. It is home to 0.46% of people living in the state.
25.5K
population of Marlboro County, SC (2024)
0.46%
County share of the South Carolina population (2024)
About 25,500 people lived in Marlboro County, SC in 2024.
Population estimates, 2000–2024
What are Marlboro County, SC’s age demographics?
About 5,200 Marlboro County residents are aged 65 and older in 2024. That represents 20.4% of its population. For comparison, the age group represents 19.8% of South Carolina’s population and 18% in the US overall.
Another 5,000 Marlboro County residents, or 19.6% of the population, were children under 18. For comparison, the age group represents 21.2% of South Carolina’s population and 21.6% in the US overall.
A higher share of Marlboro County, SC's population is aged 65 or older than the US as a whole.
Population estimates by age group, (2024)
What are Marlboro County, SC’s racial and ethnic demographics?
Non-Hispanic Black or African American residents make up 50.3% of the Marlboro County population, higher than the national share of 12.6%. Marlboro County also has a larger share of people identifying as non-Hispanic American Indian and Alaska Native (4.6%) than the US overall (0.72%).
In contrast, Marlboro County’s non-Hispanic white population accounts for 39%, below the 57.5% nationwide, and the Hispanic population makes up 3% of the county, compared with 20% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
Marlboro County, SC has a higher share of a non-Hispanic Black or African American population than South Carolina as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in Marlboro County, SC is Bennettsville with about 7,600 residents in 2024.
Cities and towns in Marlboro County, SC ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Bennettsville | 7,595 |
| 2. | McColl | 1,976 |
| 3. | Clio | 574 |
| 4. | Blenheim | 107 |
| 5. | Tatum | 70 |
| 6. | Balance of Marlboro County | 15,176 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
