Unemployment Rate in Jefferson County, KY was 3.30% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Jefferson County, KY reached a record high of 16.50 in April of 2020 and a record low of 2.90 in December of 1998. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Jefferson County, KY - last updated from the United States Federal Reserve on April of 2026.