Black Hawk County, Iowa


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.

History

Black Hawk County was formed on February 17, 1853, from sections of Buchanan County. It was named after Black Hawk, a Sauk leader during the 1832 Black Hawk War.

Geography

According to the U.S. Census Bureau, the county has an area of, of which is land and 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.

Major highways

2020 census

As of the 2020 census, the county had a population of 131,144. The median age was 36.8 years. 21.8% of residents were under the age of 18 and 17.7% of residents were 65 years of age or older. For every 100 females there were 95.7 males, and for every 100 females age 18 and over there were 93.6 males age 18 and over.
94.55% of the population reported being of one race. The racial makeup of the county was 78.4% White, 10.4% Black or African American, 0.3% American Indian and Alaska Native, 2.6% Asian, 0.7% Native Hawaiian and Pacific Islander, 2.1% from some other race, and 5.4% from two or more races. Hispanic or Latino residents of any race comprised 4.9% of the population.
87.0% of residents lived in urban areas, while 13.0% lived in rural areas.
There were 54,223 households in the county, of which 27.0% had children under the age of 18 living in them. Of all households, 43.0% were married-couple households, 21.1% were households with a male householder and no spouse or partner present, and 28.3% were households with a female householder and no spouse or partner present. About 31.9% of all households were made up of individuals and 12.6% had someone living alone who was 65 years of age or older.
There were 58,559 housing units, of which 54,223 were occupied, and 7.4% were vacant. Among occupied housing units, 65.3% were owner-occupied and 34.7% were renter-occupied. The homeowner vacancy rate was 1.7% and the rental vacancy rate was 8.9%.

2010 census

The 2010 census recorded a population of 131,090 in the county, with a population density of. There were 55,887 housing units, of which 52,470 were occupied.
File:BlackHawkCountyIA2022PopPyr.png|thumb|left|2022 US Census population pyramid for Black Hawk County from ACS 5-year estimates

2000 census

At the 2000 census there were 128,012 people, 49,683 households, and 31,946 families in the county. The population density was. There were 51,759 housing units at an average density of. 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%. were Hispanic or Latino of any race.
Of the 49,683 households 29.50% had children under the age of 18 living with them, 50.20% were married couples living together, 10.80% had a female householder with no husband present, and 35.70% were non-families. 27.10% of households were one person and 10.90% were one person aged 65 or older. The average household size was 2.45 and the average family size was 2.97.
Age spread: 23.10% under the age of 18, 15.70% from 18 to 24, 25.20% from 25 to 44, 22.00% from 45 to 64, and 14.00% 65 or older. The median age was 34 years. For every 100 females, there were 92.30 males. For every 100 females age 18 and over, there were 88.80 males.
The median household income was $37,266 and the median family income was $47,398. Males had a median income of $33,138 versus $23,394 for females. The per capita income for the county was $18,885. About 7.90% of families and 13.10% of the population were below the poverty line, including 14.40% of those under age 18 and 8.90% of those age 65 or over.

Communities

Cities

  • Cedar Falls
  • Dunkerton
  • Elk Run Heights
  • Evansdale
  • Gilbertville
  • Hudson
  • Janesville
  • Jesup
  • La Porte City
  • Raymond
  • Waterloo

    Census-designated place

  • Washburn

    Other unincorporated communities

  • Armour
  • Benson
  • Blessing
  • Dewar
  • Eagle Center
  • Finchford
  • Glasgow
  • Jubilee
  • Raymar
  • Voorhies

    Townships

Black Hawk County is divided into seventeen townships:
The population ranking of the following table is based on the 2020 census of Black Hawk County.
† county seat
RankCity/Town/etc.Municipal typePopulation
1† 'WaterlooCity67,314
2Cedar FallsCity40,713
3EvansdaleCity4,561
4HudsonCity2,546
5Jesup City193
6La Porte CityCity2,284
7Elk Run HeightsCity1,069
8Janesville City115
9WashburnCDP870
10DunkertonCity842
11GilbertvilleCity794
12Raymond'City759

Politics

Black Hawk County has been a Democratic stronghold in Iowa since the late 1980s. In presidential politics, it is one of the most Democratic counties in Iowa. As the state swung hard to the right in the 2010s and 2020s, Black Hawk County—as a major population center, in accordance with most other population centers nationwide—has remained staunchly Democratic. In 2016, however, Donald Trump became the first Republican since 1984 to hold the Democratic candidate's margin to under 10 percent, and in 2024 Trump came the closest to winning the county since 1984.