Unemployment Rate in Mason County, WA was 6.20% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Mason County, WA reached a record high of 16.60 in April of 2020 and a record low of 3.50 in June of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Mason County, WA - last updated from the United States Federal Reserve on April of 2026.