Resident Population in Clarendon County, SC was 31.00400 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Clarendon County, SC reached a record high of 34.94700 in January of 2010 and a record low of 25.60400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Clarendon County, SC - last updated from the United States Federal Reserve on May of 2024.