Calhoun County, South Carolina
Calhoun County, South Carolina, has 14,188 residents (July 2025 estimate). Its county seat is St. Matthews. It uses Eastern Time and covers 381 sq mi (987 km²) of land.
- Resident population, July 2025
- 14,188
- Land area
- 381 sq mi (987 km²)
- County seat or government
- St. Matthews
- Time zone
- Eastern TimeUTC-05:00 in January; UTC-04:00 in July
- Median household income
- $58,682 ± $6,223
- Median home value
- $172,100 ± $20,066
- Median rent, with utilities
- $1,052 ± $123
- Homes lived in by their owners
- 85% ± 3.5 points
- County type
- County
- Metro or micro area
- Columbia, SC metro areaOutlying county
- Water area
- 11.3 sq mi (29.4 km²)
- State
- South Carolina
- County code (FIPS)
- 45017
- Coordinates (central point)
- 33.674780, -80.780347
These coordinates mark a central point for the area, not a street address. Income, home value, rent and homes lived in by their owners: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 13, 2026.
Time zones in Calhoun County
| Time zone | Local time and UTC offset | Next clock change |
|---|---|---|
| Eastern TimeAmerica/New_York | UTC-05:00 in January; UTC-04:00 in July. Enable JavaScript for the live clock. | Enable JavaScript for upcoming changes. |
Near a time-zone line, check where you are with the time-zone finder. Your phone’s setting can differ.
ZIP Code areas, largest first
- 2905321,076 people
- 2911815,135 people
- 291358,294 people
- 291607,419 people
- 291123,847 people
- 290473,537 people
- 290302,045 people
7 ZIP Code areas overlap Calhoun County. People counts are 2020–2024 estimates for each whole ZIP area. Mailing ZIPs can differ; check an address with USPS ZIP Code Lookup.
Official county information
We don’t have a website for this county yet. The US government’s local-office directory ↗ lists its offices. A geographic lookup cannot determine eligibility, tax liability or a court obligation.
School districts in Calhoun County, largest first
- Calhoun County School District14,182 people
Districts with land in the county; a district can cross county lines. People counts are American Community Survey 2020–2024 5-year estimates. A district boundary doesn’t decide which school a student attends.
Cities, towns and communities, largest first
These areas overlap the mapped boundary; an overlap does not mean that every address belongs to both.
- St. Matthews, South Carolina (town)1,645 people
- Cameron, South Carolina (town)427 people
Bordering areas, nearest first
Distances are straight lines between map points.
- Orangeburg County, South Carolina17 mi south
- Richland County, South Carolina25 mi north
- Sumter County, South Carolina28 mi northeast
- Lexington County, South Carolina32 mi northwest
- Clarendon County, South Carolina32 mi east
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