Resident Population in Iron County, WI was 6.22800 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Iron County, WI reached a record high of 7.00000 in January of 1977 and a record low of 5.65600 in January of 2016. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Iron County, WI - last updated from the United States Federal Reserve on May of 2024.