Resident Population in Wayne County, IL was 15.76100 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Wayne County, IL reached a record high of 18.79400 in January of 1983 and a record low of 15.76100 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Wayne County, IL - last updated from the United States Federal Reserve on May of 2024.