Black Hawk County, Iowa

Black Hawk County
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 / 42.468888888889; -92.305277777778
Country United States
State Iowa
Founded1843
Named afterBlack Hawk
SeatWaterloo
Largest cityWaterloo
Area
  Total
573 sq mi (1,480 km2)
  Land566 sq mi (1,470 km2)
  Water6.9 sq mi (18 km2)  1.2%
Population
 (2020)
  Total
131,144
  Density230/sq mi (88/km2)
Time zoneUTC−6 (Central)
  Summer (DST)UTC−5 (CDT)
Congressional district2nd
Websitewww.blackhawkcounty.iowa.gov

Black Hawk County is a county in the northeastern part of the 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.

Black Hawk County is part of the Waterloo – Cedar Falls metropolitan area.