Unemployment Rate in Big Horn County, MT was 6.40% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Big Horn County, MT reached a record high of 17.60 in January of 1992 and a record low of 3.10 in September of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Big Horn County, MT - last updated from the United States Federal Reserve on April of 2026.