Polk County, Iowa
![]() The Polk County Courthouse in Des Moines, listed on NRHP No. 79000925 |
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administration | |
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US state : | Iowa |
Administrative headquarters : | Des Moines |
Address of the administrative headquarters: |
County Administrative Office Bldg. 111 Court Avenue Des Moines, IA 50309-2218 |
Foundation : | January 13, 1846 |
Made up from: | Original County |
Area code : | 001 515 |
Demographics | |
Residents : | 430,640 (2010) |
Population density : | 292 inhabitants / km 2 |
geography | |
Total area : | 1533 km² |
Water surface : | 58 km² |
map | |
Website : www.polkcountyiowa.gov |
The Polk County is a county in the US -amerikanischen State Iowa . In 2010 , the county had 430,640 people and a population density of 292 people per square kilometer. By 2013 the number of inhabitants increased slightly to 451,677. The county seat is Des Moines .
Polk County forms the core of the metropolitan area around the city of Des Moines.
geography
The county is located slightly south of the geographic center of Iowa and is traversed by the Des Moines River . It has an area of 1533 square kilometers, of which 58 square kilometers are water. The following neighboring counties border Polk County:
Boone County | Story County | |
Dallas County |
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Jasper County |
Madison County | Warren County | Marion County |
history
Population development | |||
---|---|---|---|
Census | Residents | ± in% | |
1850 | 4513 | - | |
1860 | 11,625 | 157.6% | |
1870 | 27,857 | 139.6% | |
1880 | 42,395 | 52.2% | |
1890 | 65,410 | 54.3% | |
1900 | 82,624 | 26.3% | |
1910 | 110,438 | 33.7% | |
1920 | 154.029 | 39.5% | |
1930 | 172.837 | 12.2% | |
1940 | 195,835 | 13.3% | |
1950 | 226.010 | 15.4% | |
1960 | 266.315 | 17.8% | |
1970 | 286.101 | 7.4% | |
1980 | 303.170 | 6% | |
1990 | 327.140 | 7.9% | |
2000 | 374601 | 14.5% | |
2010 | 430,640 | 15% | |
2013 estimate | 451,677 | 4.9% | |
Before 1900 1900–1990 2000 2010–2013 |
Three years before the county was founded, Captain James Allen came to the area around what is now Des Moines to build a fort. This was named after the Des Moines River , the largest and most important river in the area between the Mississippi and Missouri rivers .
The settlements of Brooklyn, Polk City, Dudley, and Fort Des Moines decided to form a new county. In 1845 MPs were sent to the Legislative Assembly of the Iowa Territory to determine the boundaries of the new county.
On January 13, 1845, a law was finally passed that included the establishment of the county and the definition of its boundaries. On January 17, 1846, the organization of Polk County, named after the President James K. Polk (1795-1849). In the same year, Brooklyn was selected as the seat of administration, which is now part of the city of Des Moines.
The first court and administration building was also built in 1846. Construction of a new building began in 1858, but construction dragged on until 1866 due to the civil war . 1887–1888 the building got a new roof, a dome and an extension.
In 1900 it was decided to build what is now the Polk County Courthouse , which was opened in 1906. In 1962 the building was modernized.
However, since the building no longer met all requirements, the old post office was renovated in 1975 to accommodate part of the administration there.
population
According to the 2010 census , Polk County had 430,640 people in 168,352 households. The population density was 292 inhabitants per square kilometer. Statistically, there were 2.44 people each in the 168,352 households.
The racial the population was composed of 84.7 percent white, 6.0 percent African American, 0.3 percent Native American, 3.5 percent Asian and other ethnic groups; 2.4 percent were descended from two or more races. Hispanic or Latino of any race was 7.6 percent of the population.
25.5 percent of the population were under 18 years old, 63.7 percent were between 18 and 64 and 10.8 percent were 65 years or older. 51.0 percent of the population was female.
The median income for a household was 56,094 USD . The per capita income was $ 29,246. 10.3 percent of the population lived below the poverty line.
Localities
Citys and Census-designated places (CDP) :
place | Residents 2010 |
Residents 2013 |
FIPS | GNIS | Type |
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Des Moines 3 | 203,433 | 207,510 | 19-21000 | 465961 | City |
West Des Moines 3 | 56,609 | 61,255 | 19-83910 | 462839 | City |
Ankeny | 45,582 | 51,567 | 19-02305 | 454194 | City |
Urbandals 2 | 39,463 | 41,776 | 19-79950 | 462504 | City |
Johnston | 17,278 | 19,798 | 19-39765 | 457978 | City |
Clive 2 | 15,447 | 16,590 | 19-14520 | 455485 | City |
Altoona | 14,541 | 15,653 | 19-01630 | 454160 | City |
Norwalk 1 | 8945 | 9639 | 19-57675 | 459658 | City |
Pleasant Hill | 8785 | 9082 | 19-63525 | 460234 | City |
Grimes 2 | 8246 | 9335 | 19-33060 | 457148 | City |
Windsor Heights | 4860 | 4891 | 19-86250 | 463128 | City |
Carlisle 1 | 3876 | 3951 | 19-10765 | 455166 | City |
Bondurant | 3860 | 4614 | 19-07390 | 454745 | City |
Polk City | 3418 | 3976 | 19-64020 | 460351 | City |
Saylorville | 3301 | 3085 | 19-70995 | 461450 | CDP |
Mitchellville 4 | 2254 | 2256 | 19-52950 | 459156 | City |
Granger 2 | 1244 | 1367 | 19-32160 | 457046 | City |
Elkhart | 683 | 691 | 19-24735 | 456304 | City |
Runnells | 507 | 507 | 19-69240 | 460848 | City |
Alleman | 432 | 440 | 19-01180 | 454132 | City |
Sheldahl 5 | 319 | 321 | 19-72345 | 461555 | City |
1 - partly in Warren County
2 - partly in Dallas County
3 - partly in Dallas and Warren County
4 - partly in Jasper County
5 - partly in Boone and Story County
Unincorporated communities not recorded separately from the census :
structure
Polk County is divided into 21 townships :
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There is also the Saylorville Reservoir UT , an unorganized territory that does not belong to any township.
See also
- Polk County Courthouse
- List of Entries on the National Register of Historic Places in Polk County, Iowa
Individual evidence
- ^ Extract from the National Register of Historic Places . Retrieved March 13, 2011
- ^ Polk County ( English ) In: Geographic Names Information System . United States Geological Survey . Retrieved February 22, 2011.
- ↑ a b c U.S. Census Bureau, State & County QuickFacts - Polk County, IA. Retrieved November 4, 2014
- ↑ a b National Association of Counties.Retrieved November 4, 2014
- ^ US Census Bureau - Census of Population and Housing.Retrieved March 15, 2011
- ^ Extract from Census.gov.Retrieved February 16, 2011
- ^ E-ReferenceDesk, Polk County, Iowa - County History.Retrieved March 2, 2011
- ↑ a b American Fact Finder.Retrieved April 13, 2015
- ↑ 2010 US Census Iowa Township and Other Subdivision Population. Retrieved July 23, 2019 .
Web links
Coordinates: 41 ° 41 ′ N , 93 ° 34 ′ W