Black Hawk County, Iowa

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Black Hawk County, Iowa
Black Hawk County Courthouse in Waterloo IA.JPG
Black Hawk County Courthouse in Waterloo
Map of Iowa highlighting Black Hawk County
Location in the U.S. state of Iowa
Map of the United States highlighting 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 located in the northeastern part of U.S. state of Iowa. As of the 2010 census, the population was 131,090,[1] making it the fourth-most populous county in Iowa. The county seat is Waterloo.[2]

Black Hawk County is included in the Waterloo-Cedar Falls, IA Metropolitan Statistical Area.[3]

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.[4]

Geography

According to the U.S. Census Bureau, the county has a total 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.[5]

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

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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. 2014 132,897 [6] 1.4%
U.S. Decennial Census[7]
1790-1960[8] 1900-1990[9]
1990-2000[10] 2010-2013[1]

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.[11]

2000 census

2000 Census Age Pyramid for Black Hawk County

As of the census[12] 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

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Unincorporated communities

Townships

Black Hawk County is divided into seventeen townships:

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See also

References

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  4. ↑ Black Hawk County Online
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External links

 Butler County Bremer County Fayette County
Grundy County Buchanan County
  Black Hawk County, Iowa  
Tama County Benton County

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