Demographics of Allendale County, South Carolina

Allendale County, South Carolina had 7,355 people on July 1, 2025, by the Census Bureau’s estimate: −585 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.

Allendale County, in four figures

7,355
Population: July 1, 2025, Vintage 2025 estimate.; −7.4%
Change since July 2020: −585 people.; 44.7 ±1.8
Median age: ACS 2020–⁠2024.; $32,328 ±$7,995
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.

Allendale County, South Carolina's population shrank 7.4% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Allendale 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

Allendale County, South Carolina's population shrank 7.4% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Allendale 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	7,940	100.0	100.0
2021	7,710	97.1	100.2
2022	7,510	94.6	100.7
2023	7,588	95.6	101.6
2024	7,531	94.8	102.5
2025	7,355	92.6	103.1

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Population of Allendale 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	7,940	−97	−13	0	−70
2021	7,710	−230	−89	+1	−138
2022	7,510	−200	−71	+3	−133
2023	7,588	+78	−34	+8	+103
2024	7,531	−57	−51	+7	−14
2025	7,355	−176	−52	+7	−129

Age, 2020–2024

The median age is 44.7 ±1.8: for men 41.6 ±2.0 and for women 48.0 ±1.9. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Allendale County by age, ACS 2020–2024
Age	People	Share	South Carolina	United States
Under 5	326 ±117	4.3% ±1.5	5.5% ±<0.1	5.6% ±<0.1
5 to 17	1,070 ±171	14.0% ±2.2	16.0% ±0.1	16.3% ±<0.1
18 to 24	619 ±176	8.1% ±2.3	9.1% ±0.1	9.1% ±<0.1
25 to 44	1,851 ±253	24.2% ±3.3	25.3% ±0.1	26.9% ±<0.1
45 to 64	2,076 ±231	27.1% ±3.0	25.2% ±0.1	24.8% ±<0.1
65 and over	1,719 ±225	22.4% ±2.9	18.9% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $32,328 ±$7,995, and income per person $25,038 ±$5,501, 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 Allendale County by income, ACS 2020–2024
Household income	Households	Share	South Carolina	United States
Under $25,000	1,182 ±228	36.5% ±6.8	17.0% ±0.2	14.6% ±<0.1
$25,000 to $49,999	852 ±215	26.3% ±6.5	19.6% ±0.3	16.7% ±<0.1
$50,000 to $74,999	498 ±146	15.4% ±4.5	17.0% ±0.3	15.5% ±<0.1
$75,000 to $99,999	220 ±91	6.8% ±2.8	13.1% ±0.2	12.6% ±<0.1
$100,000 to $149,999	296 ±137	9.1% ±4.2	16.4% ±0.2	17.5% ±<0.1
$150,000 to $199,999	18 to 140	0.6% to 4.3%	8.0% ±0.2	9.6% ±<0.1
$200,000 or more	33 to 189	1.0% to 5.8%	8.9% ±0.2	13.4% ±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%.

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 Allendale County by age, ACS 2020–2024
Age	Below poverty	Rate	South Carolina	United States
All ages	1,911 ±398	28.2% ±5.9	14.1% ±0.2	12.5% ±0.1
Under 18	377 ±143	27.0% ±9.2	19.4% ±0.4	16.1% ±0.1
18 to 59	940 ±252	27.3% ±6.7	13.1% ±0.2	11.6% ±0.1
60 and over	594 ±152	30.4% ±6.8	11.6% ±0.3	11.0% ±<0.1

Housing, 2020–2024

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Housing in Allendale County, ACS 2020–2024
Measure	Allendale County	South Carolina	United States
Housing units	4,050 ±28	2,443,039 ±311	143,775,355 ±10,234
Occupied	80.0% ±3.6	86.7% ±0.2	89.9% ±0.1
Vacant	20.0% ±3.6	13.3% ±0.2	10.1% ±0.1
Owner occupied	61.7% ±5.7	71.9% ±0.3	65.2% ±0.3
Renter occupied	38.3% ±6.2	28.1% ±0.3	34.8% ±0.1
Median home value	$76,200 ±$11,811	$259,000 ±$1,421	$332,700 ±$236
Median gross rent	$662 ±$180	$1,180 ±$9	$1,413 ±$2
Median year built	1977 ±4	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 Allendale County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	South Carolina	United States
Hispanic or Latino	278 to 892	3.6% to 11.6%	7.4% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	1,748 ±5	22.8% ±0.1	61.9% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	5,081 ±314	66.3% ±4.1	24.6% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 44	0% to 0.6%	1.7% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	8 to 118	0.1% to 1.5%	0.2% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 29	0% to 0.4%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 7	0% to 0.1%	0.5% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	153 ±74	2.0% ±1.0	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 Allendale County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	South Carolina	United States
Born in the state	5,688 ±335	74.2% ±4.4	52.6% ±0.2	57.3% ±<0.1
Born in another state	1,806 ±320	23.6% ±4.2	40.4% ±0.2	26.9% ±<0.1
Born a citizen outside the states	25 to 165	0.3% to 2.2%	1.2% ±0.1	1.7% ±<0.1
Born abroad	20 to 124	0.3% to 1.6%	5.8% ±0.1	14.1% ±<0.1
Naturalized citizens	0 to 69	0% to 0.9%	2.6% ±0.1	7.4% ±<0.1
Not citizens	10 to 72	0.1% to 0.9%	3.2% ±0.1	6.8% ±<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%.

Allendale County among the counties of South Carolina

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

Counties of South Carolina near Allendale County in population, July 2025
County	July 2025	Change since 2020
Hampton County	18,174	−1.9%
Lee County	15,730	−5.0%
Calhoun County	14,188	+0.5%
Bamberg County	12,796	−3.5%
McCormick County	10,215	+7.3%
Allendale County	7,355	−7.4%

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