Allendale County, South Carolina Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 46th-largest in South Carolina
The population of Allendale County, South Carolina is 7,738 as of the 2023 American Community Survey, making it the 46th-largest county in South Carolina. The median household income is $31,603, the median home value is $61,600, and the median age is 42.5.
The population of Allendale County has declined 27.1% since 2010 (10,354 → 7,551), a -2.23% annualized rate.
7,738
Population
-2.23%
Annual growth
19
People / sq mi
$31,603
Median Income
$61,600
Median Home Value
Allendale County covers 408 sq mi of land at 19.0 people per square mile.
About Allendale County, SC
Allendale County is a county in South Carolina with a population of 7,738. It ranks #46 among counties in South Carolina by population. The median age is 42.5, older than the national median. The population is 53.6% male and 46.4% female.
The median household income in Allendale County is $31,603, below the US median of $74,580. 22.3% of residents live below the federal poverty level. Home values sit at a median of $61,600, with monthly rent averaging $691. The homeownership rate of 64.7% is close to the national rate of 64.8%.
Educational attainment in Allendale County reflects 13.3% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 2.5% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 37.7 minutes each way.
Allendale County Population History (2010-2024)
The county of Allendale County had a population of 10,354 in 2010 and 7,551 in 2024, a -27.1% growth over 14 years. The peak was 10,354 in 2010. Average annual growth rate: -2.21%.
7,551
Population (2024)
10,354
Population (2010)
10,354
Peak (2010)
-2.21%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 10,354 |
| 2011 | 10,237 |
| 2012 | 9,982 |
| 2013 | 9,828 |
| 2014 | 9,704 |
| 2015 | 9,435 |
| 2016 | 9,071 |
| 2017 | 9,010 |
| 2018 | 8,906 |
| 2019 | 8,627 |
| 2020 | 7,934 |
| 2021 | 7,714 |
| 2022 | 7,508 |
| 2023 | 7,596 |
| 2024 | 7,551 |
Race & Ethnicity
| White | 24.2% |
| Black or African American | 64.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 2.2% |
| Two or More Races | 0.0% |
Age & Sex
42.5
Median Age
46.4%
Female
53.6%
Male
21.7%
Age 65+
Age Distribution
Children (under 15): 15.4% · Seniors (65+): 21.7%
Income & Poverty
| Median household income | $31,603$-35,215 vs state |
| Mean household income | $54,043 |
| Per-capita income | $23,057 |
| Poverty rate | 22.3%+12.2% vs state |
| Unemployment rate | 4.7% |
| Employment-to-population | 39.3% |
Top Industries by Employment
The largest employment sector in Allendale County is professional & business services, accounting for 29.6% of workers.
How residents commute
0.2%
Drive alone
1.6%
Carpool
83.5%
Public transit
2.5%
Work from home
37.7 min
Avg commute
Housing
$61,600$-175,100 vs state
Median home value
$691
Median rent
64.7%
Homeownership rate
4,055
Total housing units
78.0%
Occupied
22.0%
Vacant
35.3%
Renter-occupied
Social & access
87.8%
With health insurance
74.8%
With broadband internet
22.4%
Foreign-born
6.2%
Veterans (18+)
26.5%
With a disability
94.8%
Speak language other than English at home
Education
79.6%
High School+
13.3%
Bachelor's+
Largest cities in South Carolina
Other counties in South Carolina
Part of South Carolina
Metro areas in South Carolina
County rankings
Frequently Asked Questions
Allendale County, South Carolina has a population of 7,738 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 46th-largest county in South Carolina. Population density is 19 people per square mile.
The population of Allendale County has declined 27.1% since 2010 (10,354 → 7,551), a -2.23% annualized rate.
The median household income in Allendale County, South Carolina is $31,603, with mean (average) household income of $54,043 and per-capita income of $23,057. 22.3% of residents live below the federal poverty level.
In Allendale County, the largest racial and ethnic groups are Black or African American (64.0%), White (24.2%), Hispanic or Latino (2.2%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Allendale County, South Carolina is 42.5 years. Residents are 46.4% female and 53.6% male.
The median home value in Allendale County is $61,600 and median monthly rent is $691. 64.7% of occupied housing units are owner-occupied. The county has 4,055 total housing units, 22.0% of which are vacant.
The largest employment sector in Allendale County, South Carolina is professional, scientific, and management services, employing 29.6% of workers. The unemployment rate is 4.7%.
Charleston is among the largest cities associated with Allendale County, South Carolina, with a population of 152,014.
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Full rankings of South Carolina counties
Statewide data for South Carolina
Population, race, income, age, and trends across South Carolina
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.