Allendale County's 2026 population is estimated at 7,461, reflecting a -0.6% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). Allendale County is the 46th largest county in South Carolina. The 2010 population was 10,354 and has grown -27.94% since 2010.
Data after 2023 is projected based on recent change
Overall: 44.7 years
Female: 48 years
Male: 41.6 years
There are 6,265 adults, (1,719 of whom are seniors) in Allendale County.
Female: 3,519 (45.9%)
Male: 4,142 (54.1%)
The racial composition of Allendale County includes 66.32% Black or African American, 24.5% White, 4.09% Asian, and smaller percentages for Two or more races, other race, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Black or African American | 5,081 | 66.32% |
| White | 1,877 | 24.5% |
| Asian | 313 | 4.09% |
| Two or more races | 196 | 2.56% |
| Other race | 111 | 1.45% |
| Native American | 72 | 0.94% |
| Native Hawaiian or Pacific Islander | 11 | 0.14% |
Allendale County 's average per capita income is $37,358. Household income levels show a median of $32,328. The poverty rate stands at 28.15%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $72,500 | - |
| Families | $52,132 | $81,351 |
| Households | $32,328 | $58,513 |
| Non Families | $19,657 | $28,255 |
Average Income
Median Household Income
Poverty Rate