Unemployment Rate in Carroll County, MD was 3.40% in April of 2026, according to the United States Federal Reserve. Historically, Unemployment Rate in Carroll County, MD reached a record high of 8.00 in February of 2010 and a record low of 1.20 in April of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Carroll County, MD - last updated from the United States Federal Reserve on June of 2026.