The population count of Black Hawk County, IA was 133,009 in 2018. The population count of Pottawattamie County, IA was 93,503 in 2018. The population count of Walworth County, WI was 103,013 in 2018.
Population
Population Change
Above charts are based on data from the U.S. Census American Community Survey | ODN Dataset | API -