Black Hawk County, Iowa

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,[1] making it Iowa's fourth-most populous county. The county seat is Waterloo.[2]

Black Hawk County
U.S. county
Black Hawk County Courthouse in Waterloo
Location within the U.S. state of Iowa
Iowa's location within the U.S.
Coordinates: 42°28′08″N 92°18′19″W
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
 • Estimate 
(2019)
131,228
 • Density230/sq mi (88/km2)
Time zoneUTC−6 (Central)
 • Summer (DST)UTC−5 (CDT)
Congressional district1st
Websitewww.co.black-hawk.ia.us

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

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.[4]

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.[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.%±
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%
Est. 2019131,228[6]0.1%
U.S. Decennial Census[7]
1790-1960[8] 1900-1990[9]
1990-2000[10] 2010-2019[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

At the 2000 census there were 128,012 people, 49,683 households, and 31,946 families 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%.[12] 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

Census-designated place

Other 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

Politics
Presidential Elections Results
Presidential Elections Results[14]
Year Republican Democratic Third Parties
2016 42.7% 27,476 50.1% 32,233 7.3% 4,696
2012 39.1% 26,235 59.3% 39,821 1.6% 1,085
2008 38.1% 24,662 60.5% 39,184 1.5% 941
2004 43.9% 28,046 55.4% 35,392 0.7% 469
2000 42.6% 23,468 54.7% 30,112 2.7% 1,505
1996 36.4% 19,322 55.8% 29,651 7.8% 4,136
1992 34.8% 21,398 48.1% 29,584 17.2% 10,568
1988 42.9% 24,112 56.4% 31,657 0.7% 402
1984 50.2% 32,262 49.0% 31,467 0.8% 504
1980 46.5% 29,627 43.1% 27,443 10.4% 6,652
1976 50.2% 30,994 47.8% 29,508 2.0% 1,213
1972 57.5% 30,929 40.4% 21,721 2.1% 1,132
1968 51.7% 25,594 42.6% 21,097 5.8% 2,863
1964 39.1% 19,744 60.8% 30,716 0.1% 56
1960 54.1% 28,435 45.8% 24,078 0.1% 38
1956 58.0% 28,250 41.9% 20,403 0.1% 66
1952 62.0% 28,671 37.6% 17,360 0.4% 203
1948 44.3% 16,041 54.1% 19,603 1.6% 586
1944 48.4% 15,687 51.2% 16,593 0.5% 154
1940 49.6% 17,132 50.1% 17,305 0.3% 95
1936 43.1% 13,666 53.0% 16,793 3.9% 1,222
1932 49.5% 14,746 49.3% 14,660 1.2% 359
1928 69.4% 19,409 30.3% 8,467 0.4% 113
1924 65.3% 15,813 12.3% 2,981 22.4% 5,427
1920 76.6% 16,920 18.1% 4,000 5.3% 1,181
1916 59.3% 6,742 37.6% 4,270 3.1% 349
1912 15.0% 1,601 34.8% 3,702 50.2% 5,346
1908 59.7% 5,437 34.3% 3,127 6.0% 548
1904 66.9% 5,236 23.8% 1,861 9.3% 730
1900 64.4% 5,010 32.3% 2,512 3.3% 259
1896 66.1% 4,643 30.8% 2,167 3.1% 220
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See also

References
  1. "State & County QuickFacts". United States Census Bureau. Archived from the original on July 7, 2011. Retrieved July 13, 2014.
  2. "Find a County". National Association of Counties. Archived from the original on May 31, 2011. Retrieved June 7, 2011.
  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 Archived October 13, 2007, at the Wayback Machine
  5. "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.
  6. "Population and Housing Unit Estimates". Retrieved May 21, 2020.
  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. Archived from the original on September 29, 2015. Retrieved March 6, 2011.
  12. "U.S. Census website". United States Census Bureau. Retrieved 2008-01-31.
  13. "2010 Census". Retrieved February 13, 2016.
  14. Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". uselectionatlas.org. Retrieved 10 April 2018.

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