Black Hawk County, Iowa
Black Hawk County is a county in the northeastern part of U.S. state of Iowa. As of the 2010 census, the population was 131,090, making it Iowa's fourth-most populous county. The county seat is Waterloo. The county was founded on February 17, 1843 and named after Black Hawk, a Sauk leader during the 1832 Black Hawk War.
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