Resident Population in Iron County, MO was 9.44000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Iron County, MO reached a record high of 11.20000 in January of 1978 and a record low of 9.41400 in January of 2022. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Iron County, MO - last updated from the United States Federal Reserve on May of 2024.