Unemployment Rate in Marshall County, IA was 7.20% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Marshall County, IA reached a record high of 10.00 in April of 2020 and a record low of 1.70 in October of 1999. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Marshall County, IA - last updated from the United States Federal Reserve on April of 2026.