Resident Population in Montgomery County, MS was 9.60000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Montgomery County, MS reached a record high of 13.60000 in January of 1972 and a record low of 9.53000 in January of 2022. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Montgomery County, MS - last updated from the United States Federal Reserve on May of 2024.