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Dorchester County, South Carolina
Dorchester County forms the western wedge of the Charleston metro, running from historic Summerville through the fast-growing I-26 corridor to the rural county seat of St. George. Summerville anchors most of the county's population and retail growth while manufacturers such as Bosch and new industrial parks near Ridgeville drive construction, so annexation lines and county-versus-municipal zoning matter more here than almost anywhere else in the Lowcountry.
Open the live Dorchester County map →
Dorchester County at a glance
- 178,000Population (2025)
- St. GeorgeCounty seat
- 569 sq miLand area
- 313 / sq miDensity
- $84,000Median household income
- $360,000Median home value
What the live Dorchester County map shows
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- City Boundaries: 7
- School Boundaries - Elementary: 17
- School Boundaries - Middle: 7
- School Boundaries - High: 4
- Residential: 452
- Zoning: 27
- Traffic Counts: 42
- Congressional Districts: 2
- County Commissioner Districts: 7
- Emergency Services: 74
- Flood Zones: 2
- HUD: 1
- Opportunity Zones: 1
- Soils: 98
- State House Districts: 7
- State Senate Districts: 5
- Wetlands: 7
- Zip Codes: 21
Cities and towns in Dorchester County
Harleyville, Lincolnville, North Charleston, Reevesville, Ridgeville, St. George, Summerville.
Neighboring counties
- Colleton County, SC · map
- Berkeley County, SC · map
- Orangeburg County, SC · map
- Bamberg County, SC · map
- Charleston County, SC · map