Resident Population in Moultrie County, IL was 14.34200 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Moultrie County, IL reached a record high of 14.87600 in January of 2012 and a record low of 13.26300 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Moultrie County, IL - last updated from the United States Federal Reserve on May of 2024.