Resident Population in Montgomery County, AR was 8.62000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Montgomery County, AR reached a record high of 9.51500 in January of 2010 and a record low of 5.70000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Montgomery County, AR - last updated from the United States Federal Reserve on May of 2024.