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Allendale County, South Carolina
Allendale County occupies South Carolina's southwestern corner along the Savannah River and Georgia border, traversed by I-95, with the small towns of Allendale, Fairfax, and Sycamore serving as its only population centers. It is among the state's least populous and lowest-income counties, its economy tied to timber, row-crop agriculture, and a sliver of the Savannah River Site on its western edge, with little new construction underway.
Open the live Allendale County map →
Allendale County at a glance
- 7,000Population (2025)
- AllendaleCounty seat
- 408 sq miLand area
- 17 / sq miDensity
- $32,000Median household income
- $75,000Median home value
What the live Allendale County map shows
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- City Boundaries: 4
- School Boundaries: 1
- Congressional Districts: 2
- Opportunity Zones: 2
- Soils: 107
- State House Districts: 3
- State Senate Districts: 1
- Zip Codes: 11
Cities and towns in Allendale County
Allendale, Fairfax, Sycamore, Ulmer.
Neighboring counties
- Hampton County, SC · map
- Screven County, GA · map
- Barnwell County, SC · map
- Bamberg County, SC · map
- Burke County, GA · map
- Colleton County, SC · map