Resident Population in Perry County, IL was 20.50300 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Perry County, IL reached a record high of 23.22200 in January of 1999 and a record low of 19.75700 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Perry County, IL - last updated from the United States Federal Reserve on June of 2024.