Dorchester -- U.S. County in South Carolina Population (2000): 96413 Housing Units (2000): 37237 Land area (2000): 574.728635 sq. miles (1488.540267 sq. km) Water area (2000): 1.956894 sq. miles (5.068333 sq. km) Total area (2000): 576.685529 sq. miles (1493.608600 sq. km) Located within: South Carolina (SC), FIPS 45 Location: 33.043774 N, 80.327903 W Headwords: Dorchester Dorchester, SC Dorchester County Dorchester County, SC