Resident Population in Iowa County, WI was 23.96300 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Iowa County, WI reached a record high of 23.96300 in January of 2024 and a record low of 19.30000 in January of 1974. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Iowa County, WI - last updated from the United States Federal Reserve on April of 2026.