Unemployment Rate in St. Clair County, IL was 4.80% in March of 2024, according to the United States Federal Reserve. Historically, Unemployment Rate in St. Clair County, IL reached a record high of 16.20 in April of 2020 and a record low of 3.30 in December of 2019. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in St. Clair County, IL - last updated from the United States Federal Reserve on May of 2024.