Unemployment Rate in McHenry County, IL was 4.50% in March of 2024, according to the United States Federal Reserve. Historically, Unemployment Rate in McHenry County, IL reached a record high of 17.40 in April of 2020 and a record low of 2.60 in November of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in McHenry County, IL - last updated from the United States Federal Reserve on May of 2024.