Black Hawk County, Iowa

Coordinates: 42°28′08″N 92°18′19″W / 42.46889°N 92.30528°W / 42.46889; -92.30528
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Black Hawk County
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.
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 forBlack Hawk
SeatWaterloo
Largest cityWaterloo
Area
 • Total573 sq mi (1,480 km2)
 • Land566 sq mi (1,470 km2)
 • Water6.9 sq mi (18 km2)  1.2%
Population
 (2010)
 • Total131,090
 • Density232/sq mi (90/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district1st
Websitewww.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

Adjacent counties

Demographics

Historical population
CensusPop.Note%±
1850135—
18608,2446,006.7%
187021,706163.3%
188023,91310.2%
189024,2191.3%
190032,39933.8%
191044,86538.5%
192056,57026.1%
193069,14622.2%
194079,94615.6%
1950100,44825.6%
1960122,48221.9%
1970132,9168.5%
1980137,9613.8%
1990123,798−10.3%
2000128,0123.4%
2010131,0902.4%
2015 (est.)133,455[6]1.8%
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

Unincorporated communities

Townships

Black Hawk County is divided into seventeen townships:

Population ranking

The population ranking of the following table is based on the 2010 census of Black Hawk County.[13]

† 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

See also

References

  1. ^ a b "State & County QuickFacts". United States Census Bureau. Retrieved July 13, 2014.
  2. ^ "Find a County". National Association of Counties. Retrieved 2011-06-07.
  3. ^ 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 2006-05-14. Retrieved 2006-07-21.
  4. ^ Black Hawk County Online
  5. ^ "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
  6. ^ "County Totals Dataset: Population, Population Change and Estimated Components of Population Change: April 1, 2010 to July 1, 2015". Retrieved July 2, 2016.
  7. ^ "U.S. Decennial Census". United States Census Bureau. Retrieved July 13, 2014.
  8. ^ "Historical Census Browser". University of Virginia Library. Retrieved July 13, 2014.
  9. ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. Retrieved July 13, 2014.
  10. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000" (PDF). United States Census Bureau. Retrieved July 13, 2014.
  11. ^ "Population and Housing Occupancy Status: 2010 - State -- County". United States Census Bureau American FactFinder. Retrieved March 6, 2011.
  12. ^ "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
  13. ^ http://www.census.gov/2010census/

External links

Wikimedia Commons has media related to Black Hawk County, Iowa.

42°28′08″N 92°18′19″W / 42.46889°N 92.30528°W / 42.46889; -92.30528

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