How many people live in Sumter County, SC?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 104,800 people living in Sumter County, SC. That makes Sumter County the 16th-most populous county in South Carolina. It is home to 1.9% of people living in the state.
105K
population of Sumter County, SC (2024)
1.9%
County share of the South Carolina population (2024)
About 104,800 people lived in Sumter County, SC in 2024.
Population estimates, 2000–2024
What are Sumter County, SC’s age demographics?
About 19,500 Sumter County, SC residents are aged 65 and older in 2024. That represents 18.6% of its population. For comparison, the age group represents 19.8% of South Carolina’s population and 18% in the US overall.
Another 24,400 Sumter County residents, or 23.2% 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 Sumter County, SC's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are Sumter County, SC’s racial and ethnic demographics?
Non-Hispanic Black or African American residents make up 47.3% of the Sumter County, SC population, higher than the national share of 12.6%.
In contrast, Sumter County’s Hispanic population accounts for 4.8%, below the 20% nationwide, and the non-Hispanic white population makes up 43.8% of the county, compared with 57.5% 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.
Sumter 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 Sumter County, SC is Sumter with about 43,000 residents in 2024.
Cities and towns in Sumter County, SC ranked by population
Population (2024), includes only portions within county
| City or town | Population | |
|---|---|---|
| 1. | Sumter | 42,958 |
| 2. | Mayesville | 550 |
| 3. | Pinewood | 501 |
| 4. | Balance of Sumter County | 60,767 |
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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.
