Dorchester County, South Carolina

Dorchester County, South Carolina
Location within the U.S. state of South Carolina
Interactive map of Dorchester County, South Carolina
Coordinates: 33°05′N 80°24′W / 33.08°N 80.40°W / 33.08; -80.40
Country United States
State South Carolina
FoundedFebruary 25, 1897
Named afterDorchester, Massachusetts
SeatSt. George
Largest communityNorth Charleston
Area
 • Total
571.18 sq mi (1,479.3 km2)
 • Land568.59 sq mi (1,472.6 km2)
 • Water2.59 sq mi (6.7 km2)  0.45%
Population
 (2020)
 • Total
161,540
 • Estimate 
(2024)
174,663
 • Density284.11/sq mi (109.69/km2)
Time zoneUTC−5 (Eastern)
 • Summer (DST)UTC−4 (EDT)
Congressional districts1st, 6th
Websitewww.dorchestercountysc.gov

Dorchester County is located in the U.S. state of South Carolina. As of the 2020 census, the population was 161,540. Its county seat is St. George. The county was created on February 25, 1897 by an act of the South Carolina General Assembly. Dorchester County is included in the Charleston, South Carolina metropolitan area. It is in the Lowcountry region of South Carolina.