All Employees: Professional and Business Services in Illinois was 922.00000 Thous. of Persons in March of 2024, according to the United States Federal Reserve. Historically, All Employees: Professional and Business Services in Illinois reached a record high of 984.40000 in September of 2022 and a record low of 566.50000 in August of 1991. Trading Economics provides the current actual value, an historical data chart and related indicators for All Employees: Professional and Business Services in Illinois - last updated from the United States Federal Reserve on April of 2024.