Black Hawk County, Iowa

Black Hawk County is a county in the northeastern part of U.S. state of Iowa. As of the 2020 census, the population was 131,144, making it Iowa's fifth-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.

 References 

Category:1843 establishments in Iowa Territory
Category:Iowa counties