All Employees: Government: U.S. Postal Service in Illinois was 27.55668 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, All Employees: Government: U.S. Postal Service in Illinois reached a record high of 47.03136 in November of 1995 and a record low of 26.63904 in December of 2022. 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 March of 2024.