Black Hawk County, Iowa

Black Hawk County, Iowa
Black Hawk County Courthouse in Waterloo
Location in the U.S. state of Iowa
Iowa's location in the U.S.
Founded	1843
Named for	Black Hawk
Seat	Waterloo
Largest city	Waterloo
Area
• Total	573 sq mi (1,484 km2)
• Land	566 sq mi (1,466 km2)
• Water	6.9 sq mi (18 km2), 1.2%
Population
• (2010)	131,090
• Density	232/sq mi (90/km²)
Congressional district	1st
Time zone	Central: UTC-6/-5
Website	www.co.black-hawk.ia.us

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.

Black Hawk County is part of the Waterloo-Cedar Falls, IA Metropolitan Statistical Area.

Black Hawk County was formed on February 17, 1843 from sections of Buchanan County. It was named after Black Hawk, a Sauk leader during the 1832 Black Hawk War.

According to the U.S. Census Bureau, the county has an area of 573 square miles (1,480 km²), of which 566 square miles (1,470 km²) is land and 6.9 square miles (18 km²) (1.2%) is water.

The Cedar River roughly divides the county in half from the northwest to the southeast corner. The land is mostly level since much of it is on the river's flood plain.

The 2010 census recorded a population of 131,090 in the county, with a population density of 231.20/sq mi (89.27/km²). There were 55,887 housing units, of which 52,470 were occupied.

As of the census of 2000, there were 128,012 people, 49,683 households, and 31,946 families residing in the county. The population density was 226 people per square mile (87/km²). There were 51,759 housing units at an average density of 91 per square mile (35/km²). The racial makeup of the county was 88.42% White, 7.95% Black or African American, 0.18% Native American, 0.98% Asian, 0.04% Pacific Islander, 0.93% from other races, and 1.49% from two or more races. 1.84% of the population were Hispanic or Latino of any race.