Unemployment Rate in Jefferson County, NY was 4.80% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Jefferson County, NY reached a record high of 18.50 in April of 2020 and a record low of 3.10 in October of 2022. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Jefferson County, NY - last updated from the United States Federal Reserve on April of 2026.