Civilian Labor Force in Williamson County, IL was 30568.00000 Persons in December of 2025, according to the United States Federal Reserve. Historically, Civilian Labor Force in Williamson County, IL reached a record high of 36927.00000 in September of 2007 and a record low of 26031.00000 in July of 1991. Trading Economics provides the current actual value, an historical data chart and related indicators for Civilian Labor Force in Williamson County, IL - last updated from the United States Federal Reserve on April of 2026.