Unemployment Rate in Johnson County, IL was 5.80% in December of 2025, according to the United States Federal Reserve. Historically, Unemployment Rate in Johnson County, IL reached a record high of 17.00 in April of 2020 and a record low of 3.80 in October of 2006. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Johnson County, IL - last updated from the United States Federal Reserve on April of 2026.