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
In Allendale County, home values do the distinguishing — a median of $61,600. Allendale County is a county in South Carolina with a population of 7,738. It ranks #46 among counties in South Carolina by population.
Money is tight relative to the rest of US counties: the median household earns just $31,603, below the US median of $78,538. Hardship is pronounced — at 22.3%, poverty is near the top of the range for US counties, above the national 12.4%. Real estate is inexpensive, with a typical home worth only $61,600, with typical rent around $691.
Allendale County is among the least college-educated US counties, at 13.3% — below the national 35.0%. Almost everyone commutes — only 2.5% work from home, below the national 14.0%, and the average commute runs about 38 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.
Allendale County, SC Climate
Allendale County, SC has an average annual temperature of 18°C (64°F) and receives about 1212 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
18°C
Avg Temp
1212
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 8° / 47° | 106 mm |
| February | 10° / 50° | 99 mm |
| March | 14° / 57° | 112 mm |
| April | 18° / 64° | 75 mm |
| May | 22° / 71° | 101 mm |
| June | 25° / 78° | 135 mm |
| July | 27° / 81° | 131 mm |
| August | 26° / 80° | 142 mm |
| September | 24° / 75° | 95 mm |
| October | 18° / 65° | 66 mm |
| November | 14° / 56° | 63 mm |
| December | 10° / 49° | 87 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Allendale County, SC
The most comfortable months to visit Allendale County, SC are typically May, October and April, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 34°C high). The coldest is January (near 2°C low). August is usually the wettest month.
Where to stay near Allendale County
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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.