O'Brien County, Iowa

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O'Brien County, Iowa
Map of Iowa highlighting O'Brien County
Location in the state of Iowa
Map of the United States highlighting Iowa
Iowa's location in the U.S.
Founded 1851
Named for William Smith O'Brien
Seat Primghar
Largest city Sheldon
Area
 • Total 573.25 sq mi (1,485 km2)
 • Land 573.08 sq mi (1,484 km2)
 • Water 0.17 sq mi (0 km2), 0.03%
Population
 • (2010) 14,398
 • Density 25.1/sq mi (9.7/km²)
Congressional district 4th
Time zone Central: UTC-6/-5
Website www.obriencounty.com

O'Brien County is a county located in the U.S. state of Iowa. The population was 14,398 in the 2010 census, a decline of 4.7% from 15,102 in 2000.[1][2] The county seat is Primghar.[3]

History[edit]

O'Brien County was named for William Smith O'Brien, a leader for Irish independence in 1848, and is the only O'Brien County in the United States. O'Brien County was founded in 1851.[4] The present courthouse was completed in 1917,[5] and is listed on the National Register of Historic Places.

Geography[edit]

According to the 2000 census, the county has a total area of 573.25 square miles (1,484.7 km2), of which 573.08 square miles (1,484.3 km2) (or 99.97%) is land and 0.17 square miles (0.44 km2) (or 0.03%) is water.[6]

Major highways[edit]

Adjacent counties[edit]

Demographics[edit]

Historical population
Census Pop.
1860 383
1870 715 86.7%
1880 4,155 481.1%
1890 13,060 214.3%
1900 16,985 30.1%
1910 17,262 1.6%
1920 19,051 10.4%
1930 18,409 −3.4%
1940 19,293 4.8%
1950 18,970 −1.7%
1960 18,840 −0.7%
1970 17,522 −7.0%
1980 16,972 −3.1%
1990 15,444 −9.0%
2000 15,102 −2.2%
2010 14,398 −4.7%
Est. 2012 14,172 −1.6%
U.S. Decennial Census[7]
2012 Estimate[8]
2010 Census Age Pyramid for O'Brien County.

As of the census[9] of 2010, there were 14,398 people, 6,069 households, and 3,927 families residing in the county. The population density was 25.1239/sq mi (9.7004/km2). There were 6,649 housing units at an average density of 11 per square mile (4/km²). The racial makeup of the county was 96.0% White, 0.5% Black or African American, 0.1% American Indian, 0.6% Asian, 2.0% from other races, and 0.8% from two or more races. The county has a 3.8% Hispanic or Latino background.

There were 6,069 households out of which 26.0% had children under the age of 18 living with them, 55.1% were married couples living together, 6.1% had a female householder with no husband present, 3.5% had a male householder with no wife present, and 35.3% were non-families. 31.5% of all households were made up of individuals living alone and 33.1% had someone living alone who was 65 years of age or older. The average household size was 2.31 and the average family size was 2.89.

In the county the population was spread out with 25.7% under the age of 20, 4.6% from 20 to 24, 21.3% from 25 to 44, 28.1% from 45 to 64, and 20.4% who were 65 years of age or older. The median age was 43.6 years. For every 100 females there were 95.80 males. For every 100 females, there were 99.1 males.

The median income for a household in the county was $44,018, and the median income for a family was $58,127. The per capita income for the county was $24,771. About 6.3% of families and 11.0% of the population were below the poverty line, including 15.7% of those under age 18 and 8.3% of those age 65 or over.[1]

Cities[edit]

Unincorporated communities[edit]

See also[edit]

Indian Village Site on the NRHP

References[edit]

  1. ^ a b "Population and Housing Occupancy Status: 2010 - State -- County". United States Census Bureau American FactFinder. Retrieved March 26, 2011. 
  2. ^ "Mapping the 2010 U.S. Census". The New York Times. 2010-12-13. Retrieved 2011-03-26. 
  3. ^ "Find a County". National Association of Counties. Retrieved 2011-06-07. 
  4. ^ Columbia-Lippincott Gazeteer, (New York:Columbia University Press, 1952), p. 1363
  5. ^ "O’Brien County Courthouse". Iowa Judicial Branch. Retrieved 2011-03-07. 
  6. ^ "Census 2000 U.S. Gazetteer Files: Counties". United States Census. Retrieved 2011-02-13. 
  7. ^ "U.S. Decennial Census". Census.gov. Retrieved August 3, 2013. 
  8. ^ "Annual Estimates of the Resident Population: April 1, 2010 to July 1, 2012". Census.gov. Retrieved August 3, 2013. 
  9. ^ "American FactFinder". United States Census Bureau. Retrieved 2008-01-31. 

External links[edit]

  • O'Brien County Portal style website, Government, Business, Tourism and more
  • IaGenWeb O'Brien county history, Biographies, and more
  • City-Data Comprehensive Statistical Data and more about O'Brien County


Coordinates: 43°04′53″N 95°37′34″W / 43.08139°N 95.62611°W / 43.08139; -95.62611