Black Hawk County, Iowa

Black Hawk County
Black Hawk County
County
	Black Hawk County Courthouse in Waterloo
	Logo
	Location within the U.S. state of Iowa
	Iowa's location within the U.S.
	Coordinates: 42°28′08″N 92°18′19″W / 42.468888888889°N 92.305277777778°W
Country	United States
State	Iowa
Founded	1843
Named for	Black Hawk
Seat	Waterloo
Largest city	Waterloo
Area
• Total	573 sq mi (1,480 km2)
• Land	566 sq mi (1,470 km2)
• Water	6.9 sq mi (18 km2) 1.2%
Population (2020)
• Total	131,144
• Density	230/sq mi (88/km2)
Time zone	UTC−6 (Central)
• Summer (DST)	UTC−5 (CDT)
Congressional district	2nd
Website	www.blackhawkcounty.iowa.gov

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,^[1] making it Iowa's fifth-most populous county. The county seat is Waterloo.^[2]

^ "2020 Census State Redistricting Data". census.gov. United states Census Bureau. Retrieved August 12, 2021.
^ "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
^ United States Office of Management and Budget. "Update of Statistical Area Definitions and Guidance on Their Uses" (PDF). pp. 5, 36. Archived from the original (PDF) on May 14, 2006. Retrieved July 21, 2006.