Unemployment Rate in Grundy County, MO was 3.40% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Grundy County, MO reached a record high of 11.20 in July of 1995 and a record low of 1.90 in October of 1999. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Grundy County, MO - last updated from the United States Federal Reserve on April of 2026.