Demographics of Sumter County, South Carolina

Sumter County, South Carolina had 105,067 people on July 1, 2025, by the Census Bureau’s estimate: −342 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Sumter County, in four figures

105,067
Population: July 1, 2025, Vintage 2025 estimate.; −0.3%
Change since July 2020: −342 people.; 38.0 ±0.6
Median age: ACS 2020–⁠2024.; $56,693 ±$2,137
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Sumter County, South Carolina's population shrank 0.3% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Sumter County, South Carolina's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

Sumter County, South Carolina's population shrank 0.3% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Sumter County, South Carolina's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	105,409	100.0	100.0
2021	104,703	99.3	100.2
2022	103,890	98.6	100.7
2023	104,396	99.0	101.6
2024	104,788	99.4	102.5
2025	105,067	99.7	103.1

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Population of Sumter County, South Carolina on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	105,409	−148	+11	+10	−172
2021	104,703	−706	−148	+10	−635
2022	103,890	−813	−78	+86	−786
2023	104,396	+506	+73	+147	+302
2024	104,788	+392	+9	+227	+154
2025	105,067	+279	+9	+35	+221

Age, 2020–2024

The median age is 38.0 ±0.6: for men 34.6 ±0.4 and for women 39.7 ±0.5. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Sumter County by age, ACS 2020–2024
Age	People	Share	South Carolina	United States
Under 5	6,730 ±156	6.4% ±0.1	5.5% ±<0.1	5.6% ±<0.1
5 to 17	18,093 ±1,093	17.3% ±1.0	16.0% ±0.1	16.3% ±<0.1
18 to 24	10,229 ±684	9.8% ±0.7	9.1% ±0.1	9.1% ±<0.1
25 to 44	26,631 ±832	25.4% ±0.8	25.3% ±0.1	26.9% ±<0.1
45 to 64	24,436 ±796	23.3% ±0.8	25.2% ±0.1	24.8% ±<0.1
65 and over	18,606 ±902	17.8% ±0.9	18.9% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $56,693 ±$2,137, and income per person $30,466 ±$1,149, in 2024 dollars. The median is $69,324 ±$570 in South Carolina and $80,734 ±$166 in the United States.

Households by income

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Households in Sumter County by income, ACS 2020–2024
Household income	Households	Share	South Carolina	United States
Under $25,000	9,292 ±944	22.6% ±2.3	17.0% ±0.2	14.6% ±<0.1
$25,000 to $49,999	9,072 ±866	22.1% ±2.1	19.6% ±0.3	16.7% ±<0.1
$50,000 to $74,999	7,678 ±668	18.7% ±1.6	17.0% ±0.3	15.5% ±<0.1
$75,000 to $99,999	4,533 ±586	11.0% ±1.4	13.1% ±0.2	12.6% ±<0.1
$100,000 to $149,999	6,011 ±602	14.6% ±1.4	16.4% ±0.2	17.5% ±<0.1
$150,000 to $199,999	2,344 ±529	5.7% ±1.3	8.0% ±0.2	9.6% ±<0.1
$200,000 or more	2,153 ±375	5.2% ±0.9	8.9% ±0.2	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Sumter County by age, ACS 2020–2024
Age	Below poverty	Rate	South Carolina	United States
All ages	16,879 ±1,696	16.6% ±1.7	14.1% ±0.2	12.5% ±0.1
Under 18	4,926 ±769	20.1% ±2.9	19.4% ±0.4	16.1% ±0.1
18 to 59	7,901 ±864	15.0% ±1.6	13.1% ±0.2	11.6% ±0.1
60 and over	4,052 ±661	16.5% ±2.6	11.6% ±0.3	11.0% ±<0.1

Housing, 2020–2024

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Housing in Sumter County, ACS 2020–2024
Measure	Sumter County	South Carolina	United States
Housing units	47,582 ±55	2,443,039 ±311	143,775,355 ±10,234
Occupied	86.3% ±1.3	86.7% ±0.2	89.9% ±0.1
Vacant	13.7% ±1.3	13.3% ±0.2	10.1% ±0.1
Owner occupied	68.1% ±1.6	71.9% ±0.3	65.2% ±0.3
Renter occupied	31.9% ±2.1	28.1% ±0.3	34.8% ±0.1
Median home value	$165,300 ±$6,409	$259,000 ±$1,421	$332,700 ±$236
Median gross rent	$1,057 ±$51	$1,180 ±$9	$1,413 ±$2
Median year built	1987 ±2	1992 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Sumter County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	South Carolina	United States
Hispanic or Latino	4,655 ±0	4.4% ±<0.1	7.4% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	45,700 ±379	43.6% ±0.4	61.9% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	47,939 ±704	45.8% ±0.7	24.6% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	1,516 ±213	1.4% ±0.2	1.7% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	56 to 192	0.1% to 0.2%	0.2% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	48 to 248	< 0.1% to 0.2%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	247 to 1,049	0.2% to 1.0%	0.5% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	3,995 ±757	3.8% ±0.7	3.7% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Sumter County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	South Carolina	United States
Born in the state	64,902 ±1,571	62.0% ±1.5	52.6% ±0.2	57.3% ±<0.1
Born in another state	34,859 ±1,673	33.3% ±1.6	40.4% ±0.2	26.9% ±<0.1
Born a citizen outside the states	1,822 ±387	1.7% ±0.4	1.2% ±0.1	1.7% ±<0.1
Born abroad	3,142 ±506	3.0% ±0.5	5.8% ±0.1	14.1% ±<0.1
Naturalized citizens	1,806 ±249	1.7% ±0.2	2.6% ±0.1	7.4% ±<0.1
Not citizens	1,336 ±385	1.3% ±0.4	3.2% ±0.1	6.8% ±<0.1

Sumter County among the counties of South Carolina

16th of 46 by population, July 2025. Every one is listed on the South Carolina page.

Counties of South Carolina near Sumter County in population, July 2025
County	July 2025	Change since 2020
Aiken County	181,515	+7.3%
Dorchester County	178,397	+10.1%
Pickens County	139,198	+5.7%
Florence County	138,504	+1.2%
Lancaster County	114,296	+18.3%
Sumter County	105,067	−0.3%
Oconee County	83,775	+6.3%
Orangeburg County	83,177	−0.9%
Kershaw County	73,166	+11.6%
Laurens County	71,848	+6.2%
Greenwood County	70,379	+1.5%

Elsewhere on the site

Rankings this appears in

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — counties and Puerto Rico municipios, with components of change and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026