Resident Population in Muscatine County, IA was 42.21800 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Muscatine County, IA reached a record high of 43.14100 in January of 2020 and a record low of 37.18100 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Muscatine County, IA - last updated from the United States Federal Reserve on May of 2024.