Resident Population in Iowa County, IA was 16.38100 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Iowa County, IA reached a record high of 16.65400 in January of 2020 and a record low of 14.61800 in January of 1990. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Iowa County, IA - last updated from the United States Federal Reserve on May of 2024.