|Black Hawk County, Iowa|
Black Hawk County Courthouse in Waterloo
Location in the state of Iowa
Iowa's location in the U.S.
|Named for||Black Hawk|
573 sq mi (1,484 km²)
566 sq mi (1,466 km²)
6.9 sq mi (18 km²), 1.2%
232/sq mi (90/km²)
|Time zone||Central: UTC-6/-5|
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, making it the fourth-most populous county in Iowa. The county seat is Waterloo.
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.
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.
- Bremer County (north)
- Buchanan County (east)
- Benton County (southeast)
- Tama County (southwest)
- Grundy County (west)
- Butler County (northwest)
- Fayette County (northeast)
|U.S. Decennial 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.
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.
- Eagle Center
Black Hawk County is divided into seventeen townships:
- Big Creek
- Black Hawk
- Cedar Falls
- East Waterloo
- Mount Vernon
- Spring Creek
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)
|4||Jesup (mostly in Buchanan County)||City||2,520|
|5||La Porte City||City||2,285|
|7||Elk Run Heights||City||1,117|
|8||Janesville (mostly in Bremer County)||City||930|
- National Register of Historic Places listings in Black Hawk County, Iowa
- ^ a b "State & County QuickFacts". United States Census Bureau. http://quickfacts.census.gov/qfd/states/19/19013.html. Retrieved July 13, 2014.
- ^ "Find a County". National Association of Counties. http://www.naco.org/Counties/Pages/FindACounty.aspx. Retrieved 2011-06-07.
- ^ 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 on 2006-05-14. https://web.archive.org/web/20060514003222/http://www.whitehouse.gov/omb/bulletins/fy2006/b06-01.pdf. Retrieved 2006-07-21.
- ^ Black Hawk County Online
- ^ "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. http://www.census.gov/geo/www/gazetteer/gazette.html. Retrieved 2011-04-23.
- ^ "County Totals Dataset: Population, Population Change and Estimated Components of Population Change: April 1, 2010 to July 1, 2015". http://www.census.gov/popest/data/counties/totals/2015/CO-EST2015-alldata.html. Retrieved July 2, 2016.
- ^ "U.S. Decennial Census". United States Census Bureau. http://www.census.gov/prod/www/decennial.html. Retrieved July 13, 2014.
- ^ "Historical Census Browser". University of Virginia Library. http://mapserver.lib.virginia.edu. Retrieved July 13, 2014.
- ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. http://www.census.gov/population/cencounts/ia190090.txt. Retrieved July 13, 2014.
- ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000". United States Census Bureau. http://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf. Retrieved July 13, 2014.
- ^ "Population and Housing Occupancy Status: 2010 - State -- County". United States Census Bureau American FactFinder. http://factfinder2.census.gov/faces/tableservices/jsf/pages/productview.xhtml?pid=DEC_10_PL_GCTPL2.ST05&prodType=table. Retrieved March 6, 2011.
- ^ "American FactFinder". United States Census Bureau. http://factfinder2.census.gov. Retrieved 2008-01-31.
- ^ http://www.census.gov/2010census/
|Butler County||Bremer County||Fayette County|
|Grundy County||Buchanan County|
Black Hawk County, Iowa
|Tama County||Benton County|
|This page uses content from the English language Wikipedia. The original content was at Black Hawk County, Iowa. The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License.|