Resident Population in Dorchester County, SC was 169.83300 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Dorchester County, SC reached a record high of 169.83300 in January of 2023 and a record low of 32.27600 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Dorchester County, SC - last updated from the United States Federal Reserve on May of 2024.