All Employees: Government: U.S. Postal Service in Illinois was 27.40000 Thous. of Persons in March of 2022, according to the United States Federal Reserve. Historically, All Employees: Government: U.S. Postal Service in Illinois reached a record high of 49.70000 in December of 1995 and a record low of 26.80000 in August of 2021. Trading Economics provides the current actual value, an historical data chart and related indicators for All Employees: Government: U.S. Postal Service in Illinois - last updated from the United States Federal Reserve on April of 2024.