Unemployment Rate in Charleston County, SC was 3.90% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Charleston County, SC reached a record high of 12.00 in April of 2020 and a record low of 1.40 in September of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Charleston County, SC - last updated from the United States Federal Reserve on April of 2026.