Resident Population in Jackson County, IL was 52.14100 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Jackson County, IL reached a record high of 62.53800 in January of 1983 and a record low of 52.14100 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Jackson County, IL - last updated from the United States Federal Reserve on May of 2024.