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Black Hawk County, Iowa facts for kids

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Black Hawk County
Black Hawk County Courthouse in Waterloo
Black Hawk County Courthouse in Waterloo
Map of Iowa highlighting Black Hawk County
Location within the U.S. state of Iowa
Map of the United States highlighting Iowa
Iowa's location within the U.S.
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
 (2010)
 • Total 131,090
 • Density 232/sq mi (90/km2)
Time zone UTC−6 (Central)
 • Summer (DST) UTC−5 (CDT)
Congressional district 1st

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.

History

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.

Geography

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.

Major highways

  • I-380 (IA).svg Interstate 380
  • US 20 (IA).svg U.S. Route 20
  • US 63 (IA).svg U.S. Route 63
  • US 218 (IA).svg U.S. Route 218
  • Iowa 21.svg Iowa Highway 21
  • Iowa 27.svg Iowa Highway 27
  • Iowa 57.svg Iowa Highway 57
  • Iowa 58.svg Iowa Highway 58
  • Iowa 175.svg Iowa Highway 175
  • Iowa 281.svg Iowa Highway 281

Adjacent counties

Demographics

Historical population
Census Pop.
1850 135
1860 8,244 6,006.7%
1870 21,706 163.3%
1880 23,913 10.2%
1890 24,219 1.3%
1900 32,399 33.8%
1910 44,865 38.5%
1920 56,570 26.1%
1930 69,146 22.2%
1940 79,946 15.6%
1950 100,448 25.6%
1960 122,482 21.9%
1970 132,916 8.5%
1980 137,961 3.8%
1990 123,798 −10.3%
2000 128,012 3.4%
2010 131,090 2.4%
Est. 2015 133,455 1.8%
U.S. Decennial Census
1790-1960 1900-1990
1990-2000 2010-2013

2010 census

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.

2000 census

USA Black Hawk County, Iowa age pyramid
2000 Census Age Pyramid for Black Hawk County

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.

There were 49,683 households out of which 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 all households were made up of individuals and 10.90% had someone living alone who was 65 years of age 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% who were 65 years of age 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 income for a household in the county was $37,266, and the median income for a family 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

Census-designated place

Other unincorporated communities

Townships

Black Hawk County is divided into seventeen townships:

  • Barclay
  • Bennington
  • Big Creek
  • Black Hawk
  • Cedar
  • Cedar Falls
  • Eagle
  • East Waterloo
  • Fox
  • Lester
  • Lincoln
  • Mount Vernon
  • Orange
  • Poyner
  • Spring Creek
  • Union
  • Washington

Population ranking

The population ranking of the following table is based on the 2010 census of Black Hawk County.

county seat

Rank City/Town/etc. Municipal type Population (2010 Census)
1 Waterloo City 68,406
2 Cedar Falls City 39,260
3 Evansdale City 4,751
4 Jesup (mostly in Buchanan County) City 2,520
5 La Porte City City 2,285
6 Hudson City 2,282
7 Elk Run Heights City 1,117
8 Janesville (mostly in Bremer County) City 930
9 Washburn CDP 876
10 Dunkerton City 852
11 Raymond City 788
12 Gilbertville City 712
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