Resident Population in Adair County, MO was 25.12200 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Adair County, MO reached a record high of 25.72800 in January of 2013 and a record low of 22.30000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Adair County, MO - last updated from the United States Federal Reserve on May of 2024.