Black Hawk County, IA
Black Hawk County was created from parts of Buchanan county in 1853. It spans an area of 573 mi² and is located in eastern Iowa. It is the fifth most populous county in the state, with a population of 132,408 as of 2018. The Cedar Rivers almost exactly down the county's middle. Black Hawk was named after a Sauk military leader from the Black Hawk War of 1832.