Unemployment Rate in Jefferson County, MT was 3.90% in February of 2024, according to the United States Federal Reserve. Historically, Unemployment Rate in Jefferson County, MT reached a record high of 9.30 in April of 2020 and a record low of 2.00 in September of 2022. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Jefferson County, MT - last updated from the United States Federal Reserve on May of 2024.