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.
- "State & County QuickFacts". United States Census Bureau. Archived from the original on July 7, 2011. Retrieved July 13, 2014.
- "Find a County". National Association of Counties. Archived from the original on 2011-05-31. Retrieved 2011-06-07.
- "Archived copy". Archived from the original on October 13, 2007. Retrieved September 8, 2018.CS1 maint: archived copy as title (link) CS1 maint: bot: original URL status unknown (link)