Allendale County, South Carolina Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Allendale County, SC Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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D
Health Well below averageAmong the 3 least healthy counties in South Carolina
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F
Income Well below averageLeast wealthy county in South Carolina
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F
Education Well below averageLeast educated county in South Carolina
Source: Map AI Methodology
Population: density and quick facts
| Metric | Allendale County | South Carolina Avg | U.S. Average |
|---|---|---|---|
| Population | 7,661 | 5,295,781 | 337,468,954 |
| Population density (per sq mi) | 18.6 | 165.5 | 86.4 |
| Population growth (%/yr) | -2.76% | 1.16% | 0.59% |
| Median age | 42.1 | 40.4 | 37.3 |
| Households | 3,238 | 2,118,015 | 130,235,071 |
Population in Allendale County declined by 26.8% from 2009 to 2024, reaching 7,661 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Allendale County is Gen X, aged 45–60, at 21.6% of residents. That is 1.4 points above South Carolina as a whole.
- Gen Z 13–28 1,575 20.6% -0.6 pts
- Millennials 29–44 1,605 20.9% on par
- Gen X 45–60 1,654 21.6% +1.4 pts
- Boomers 61–79 1,458 19.0% +0.6 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below South Carolina, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 46.1% of the people living in Allendale County and men 53.9%.
- Women 46.1% South Carolina 51.2%
- Men 53.9% South Carolina 48.8%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Allendale County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Allendale County has a the economy index of F, which means it scores poorly in the economy.
| Metric | Allendale County | South Carolina Avg | U.S. Average |
|---|---|---|---|
| Median household income | $33,188 | $69,383 | $80,455 |
| Income growth (%/yr) | 4.35% | 5.01% | 4.80% |
| Unemployment rate | 8.5% | 4.8% | 5.2% |
The median household income in Allendale County is about 52% lower than in South Carolina.
Housing
| Metric | Allendale County | South Carolina Avg | U.S. Average |
|---|---|---|---|
| Median home price | $267,307 | $239,609 | $248,835 |
| Median rent | $662 | $1,179 | $1,407 |
| Homeownership rate | 61.7% | 71.9% | 65.2% |
The median home price in Allendale County is about 33.7 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $662 per month for that long.
Commute Time & Mobility
Commuters in Allendale County spend about 47 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 197 hours, about 8.2 full days, spent commuting.
| Metric | Allendale County | South Carolina Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 23.7 | 22.3 | 22.4 |
| Round-trip commute (min) | 47.4 | 44.5 | 44.8 |
| Yearly time spent (hours) | 197 | 186 | 187 |
| Estimated yearly cost | $6,120 | $5,753 | $5,790 |
| Work from home | 3.5% | 11.5% | 15.0% |
| Highway traffic (vehicles/day) | 407 | 9,507 | 8,813 |
| Local road traffic (vehicles/day) | 480 | 1,499 | 1,355 |
Fastest commutes among counties in
South Carolina:
Greenwood County (16.5 min), Sumter County (18.2 min), Florence County (18.3 min).
Slowest:
McCormick County (33.9 min), Fairfield County (30.8 min), Chester County (30.6 min).
The average commute time in Allendale County is 24 minutes, longer than the 22 minutes in South Carolina.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Allendale County has a education index of F, which means it scores poorly in education.
| Metric | Allendale County | South Carolina Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 9.3% | 28.2% | 31.6% |
| Average household size | 2.08 | 2.44 | 2.53 |
Highest education index among counties in
South Carolina:
Charleston County (0.4), Beaufort County (0.3), Richland County (0.3).
Lowest:
Allendale County (0.1), Marlboro County (0.2), Chesterfield County (0.2).
Health
Allendale County has a health index of D, which means it is barely healthy.
| Metric | Allendale County | South Carolina Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 73.2 | 75.8 | 78.3 |
| Self-rated poor health | 25.8% | 19.6% | 16.3% |
| Smokers | 26.1% | 21.5% | 19.0% |
Highest health index among counties in
South Carolina:
Beaufort County (0.8), Charleston County (0.8), Dorchester County (0.8).
Lowest:
Dillon County (0.8), Allendale County (0.8), Marlboro County (0.8).
Allendale County, SC Compared With Nearby Counties
How Allendale County, SC compares with the 2 counties closest to it.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Allendale County, SC | 7,661 | $33,188 #3/3 | $267,307 #1/3 | 23.7 min #1/3 |
| Barnwell County, SC | 20,521 | $46,693 | $36,935 | 23.7 min |
| Effingham County, GA | 69,143 | $89,617 | $187,873 | 31.3 min |
Frequently Asked Questions
Common questions about Allendale County, South Carolina.
How many people live in Allendale County, South Carolina?
About 7,661 people live in Allendale County, South Carolina, in 3,238 households of 2.1 people on average. The median age is 42.1, so residents are older than the U.S. median of 37.3 by about 5 years.
Is Allendale County, South Carolina urban or rural?
Averaged over its land area, Allendale County, South Carolina has 19 people per square mile, a density typical of rural areas. That is about 22% of the U.S. average of 86.
Is Allendale County, South Carolina an affordable place to live?
The median home costs 8.1 times the median household income ($267,307 against $33,188), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $662 a month takes about 24% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
Is it hard to find a job in Allendale County, South Carolina?
Unemployment in Allendale County, South Carolina is 8.5%, well above the U.S. rate of 5.2%, so job seekers may face more competition than elsewhere.
How educated are people in Allendale County, South Carolina?
9.3% of adults in Allendale County, South Carolina hold a bachelor's degree or higher (about 1 in 11), well below the U.S. share of 31.6%.
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