Unemployment Rate in Mercer County, KY was 4.90% in May of 2026, according to the United States Federal Reserve. Historically, Unemployment Rate in Mercer County, KY reached a record high of 18.20 in April of 2020 and a record low of 2.50 in October of 1997. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Mercer County, KY - last updated from the United States Federal Reserve on July of 2026.