Resident Population in Ogle County, IL was 51.26500 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Ogle County, IL reached a record high of 55.48500 in January of 2008 and a record low of 42.60000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Ogle County, IL - last updated from the United States Federal Reserve on May of 2024.