Resident Population in Mitchell County, IA was 10.63200 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Mitchell County, IA reached a record high of 13.10800 in January of 1970 and a record low of 10.53600 in January of 2018. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Mitchell County, IA - last updated from the United States Federal Reserve on April of 2026.