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Iowa County, Iowa
Iowa County Courthouse, Marengo.jpg
Iowa County Courthouse in Marengo
Map of Iowa highlighting Iowa County
Location in the state of Iowa
Map of the U.S. highlighting Iowa
Iowa's location in the U.S.
Founded 1843
Named for Iowa River
Seat Marengo
Largest city Williamsburg
Area
 - Total
 - Land
 - Water

587 sq mi (1,520 km²)
586 sq mi (1,518 km²)
1.0 sq mi (3 km²), 0.2
Population
 - (2020)
 - Density

16,662
Congressional district 1st
Time zone Central: UTC-6/-5
Website https://iowacounty.iowa.gov/

Iowa County is a county located in the U.S. state of Iowa. As of the 2020 census, the population was 16,662.[1] The county seat is Marengo.[2]

Iowa County is one of seven counties in the United States to share the same name as the state they are located in. The other six counties are Arkansas County, Hawaii County, Idaho County, New York County, Oklahoma County, and Utah County.[3]

History[]

Iowa County was formed on February 17, 1843. It was named for the Iowa River, which flows through the county.[4]

The first courthouse was a log cabin built in 1847. This was rented by the county until 1850 when a second courthouse was completed. In 1861 construction of a third courthouse was begun. The current courthouse was built in 1892 after the county had outgrown the previous one.[5]

Iowa County is home to the Amana Colonies, a group of settlements of German Pietists, comprising seven villages. Calling themselves the Ebenezer Society or the Community of True Inspiration (German: die Gemeinde der wahren Inspiration), they first settled in New York state near Buffalo in what is now West Seneca. However, in order to live out their beliefs in more isolated surroundings they moved west, to Iowa County in 1855, living a communal life until the mid-1930s. Today, Amana is a major tourist attraction known mainly for its restaurants and craft shops, and the colonies as a whole have been listed as a National Historic Landmark since 1965.

Geography[]

According to the U.S. Census Bureau, the county has a total area of 587 square miles (1,520 km2), of which 586 square miles (1,520 km2) is land and 1.0 square mile (2.6 km2) (0.2%) is water.[6]

The county is intersected by the Iowa River and the north fork of the English River.[7]

Major highways[]

  • I-80.svg Interstate 80
  • US 6.svg U.S. Highway 6
  • US 151.svg U.S. Highway 151
  • Elongated circle 21.svg Iowa Highway 21
  • Elongated circle 149.svg Iowa Highway 149
  • Elongated circle 220.svg Iowa Highway 220
  • Elongated circle 212.svg Iowa Highway 212

Adjacent counties[]

Demographics[]

Historical populations
Census Pop.
1850 822
1860 8,029 876.8%
1870 16,644 107.3%
1880 19,221 15.5%
1890 18,270 −4.9%
1900 19,544 7.0%
1910 18,409 −5.8%
1920 18,600 1.0%
1930 17,332 −6.8%
1940 17,016 −1.8%
1950 15,835 −6.9%
1960 16,396 3.5%
1970 15,419 −6.0%
1980 15,429 0.1%
1990 14,630 −5.2%
2000 15,671 7.1%
2010 16,355 4.4%
U.S. Decennial Census[8]
1790-1960[9] 1900-1990[10]
1990-2000[11] 2010-2020[12]

Population of Iowa County from US census data

2020 census[]

The 2020 census recorded a population of 16,662 in the county, with a population density of 28.3911/sq mi (10.9619/km2). 96.24% of the population reported being of one race. 90.48% were non-Hispanic White, 0.67% were Black, 2.97% were Hispanic, 0.21% were Native American, 0.56% were Asian, 0.01% were Native Hawaiian or Pacific Islander and 5.10% were some other race or more than one race. There were 7,341 housing units, of which 6,811 were occupied.[1]

2010 census[]

The 2010 census recorded a population of 16,355 in the county, with a population density of 27.8881/sq mi (10.7677/km2). There were 7,258 housing units, of which 6,677 were occupied.[13]

2000 census[]

2000 Census age pyramid for Iowa County

As of the census[14] of 2000, there were 15,671 people, 6,163 households, and 4,301 families residing in the county. The population density was 27 people per square mile (10/km2). There were 6,545 housing units at an average density of 11 per square mile (4/km2). The racial makeup of the county was 98.70% White, 0.17% Black or African American, 0.06% Native American, 0.30% Asian, 0.03% Pacific Islander, 0.36% from other races, and 0.38% from two or more races. 0.97% of the population were Hispanic or Latino of any race.

There were 6,163 households, out of which 32.80% had children under the age of 18 living with them, 60.10% were married couples living together, 6.60% had a female householder with no husband present, and 30.20% were non-families. 25.90% of all households were made up of individuals, and 12.50% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.03.

In the county, the population was spread out, with 26.40% under the age of 18, 6.30% from 18 to 24, 27.80% from 25 to 44, 22.40% from 45 to 64, and 17.10% who were 65 years of age or older. The median age was 39 years. For every 100 females there were 95.00 males. For every 100 females age 18 and over, there were 93.20 males.

The median income for a household in the county was $41,222, and the median income for a family was $48,946. Males had a median income of $31,220 versus $24,652 for females. The per capita income for the county was $18,884. About 3.40% of families and 5.00% of the population were below the poverty line, including 4.50% of those under age 18 and 5.40% of those age 65 or over.

Politics[]

In the 2008 US presidential election, a nearly equal number of Iowa County voters voted for each major candidate.[15]

United States presidential election results for Iowa County, Iowa[16]
Year Republican Democratic Third party
No.  % No.  % No.  %
2020 6,009 61.68% 3,547 36.41% 186 1.91%
2016 5,205 58.46% 3,084 34.64% 615 6.91%
2012 4,569 51.53% 4,144 46.74% 153 1.73%
2008 4,188 48.99% 4,202 49.16% 158 1.85%
2004 4,544 53.75% 3,841 45.43% 69 0.82%
2000 3,894 52.53% 3,230 43.57% 289 3.90%
1996 3,042 43.24% 3,354 47.68% 639 9.08%
1992 2,656 38.13% 2,560 36.76% 1,749 25.11%
1988 3,247 48.57% 3,338 49.93% 100 1.50%
1984 4,352 60.02% 2,815 38.82% 84 1.16%
1980 4,153 55.21% 2,606 34.65% 763 10.14%
1976 3,926 52.98% 3,367 45.43% 118 1.59%
1972 4,202 60.34% 2,578 37.02% 184 2.64%
1968 4,133 58.12% 2,586 36.37% 392 5.51%
1964 2,828 39.82% 4,261 60.00% 13 0.18%
1960 4,944 63.47% 2,828 36.30% 18 0.23%
1956 4,875 62.68% 2,753 35.40% 149 1.92%
1952 5,625 67.27% 2,514 30.06% 223 2.67%
1948 3,659 52.44% 3,030 43.42% 289 4.14%
1944 3,959 53.94% 3,119 42.49% 262 3.57%
1940 4,696 55.33% 3,649 42.99% 143 1.68%
1936 3,360 43.57% 4,163 53.98% 189 2.45%
1932 2,628 35.04% 4,376 58.35% 495 6.60%
1928 4,091 56.85% 3,075 42.73% 30 0.42%
1924 3,549 51.91% 1,458 21.33% 1,830 26.77%
1920 4,892 69.92% 2,019 28.86% 86 1.23%
1916 2,484 57.90% 1,763 41.10% 43 1.00%
1912 1,237 30.76% 1,841 45.77% 944 23.47%
1908 2,230 52.58% 1,907 44.97% 104 2.45%
1904 2,303 52.81% 1,891 43.36% 167 3.83%
1900 2,336 52.70% 1,983 44.73% 114 2.57%
1896 2,391 53.78% 1,956 43.99% 99 2.23%
1892 1,672 42.15% 2,157 54.37% 138 3.48%
1888 1,664 44.86% 1,978 53.33% 67 1.81%
1884 1,602 43.29% 2,083 56.28% 16 0.43%
1880 1,787 52.44% 1,286 37.73% 335 9.83%



Communities[]

Cities[]

  • Ladora
  • Marengo
  • Millersburg
  • North English
  • Parnell
  • Victor
  • Williamsburg

Census-designated places[]

  • Amana
  • Conroy
  • East Amana
  • High Amana
  • Homestead
  • Middle Amana
  • South Amana
  • West Amana

Other unincorporated communities[]

  • Genoa Bluff
  • Koszta

Townships[]

  • English
  • Greene
  • Hartford
  • Hilton
  • Iowa
  • Lincoln
  • Marengo
  • Pilot
  • Sumner
  • Troy
  • Washington
  • York
  • New Liberty

Population ranking[]

The population ranking of the following table is based on the 2020 census of Iowa County.[1]

county seat

Rank City/Town/etc. Municipal type Population (2020 Census)
1 Williamsburg City 3,346
2 Marengo City 2,435
3 North English (partially in Keokuk County) City 1,065
4 Victor (partially in Poweshiek County) City 875
5 Middle Amana CDP 543
6 Amana CDP 388
7 Conroy CDP 252
8 Ladora City 229
9 Parnell City 194
10 South Amana CDP 165
11 West Amana CDP 140
t-12 Millersburg City 135
t-12 Homestead CDP 135
13 High Amana CDP 113
14 East Amana CDP 64

Education[]

The following public school districts have areas in Iowa County:

  • Belle Plaine Community School District, Belle Plaine
  • Benton Community School District, Van Horne
  • Clear Creek–Amana Community School District, Oxford
  • Deep River–Millersburg Community School District, Millersburg
  • English Valleys Community School District, North English
  • H-L-V Community School District, Victor
  • Iowa Valley Community School District, Marengo
  • Williamsburg Community School District, Williamsburg

See also[]

  • National Register of Historic Places listings in Iowa County, Iowa

References[]

  1. ^ a b c "2020 Census State Redistricting Data". United states Census Bureau. https://www2.census.gov/programs-surveys/decennial/2020/data/01-Redistricting_File--PL_94-171/Iowa/. 
  2. ^ "Find a County". National Association of Counties. http://www.naco.org/Counties/Pages/FindACounty.aspx. 
  3. ^ Joseph Nathan Kane; Charles Curry Aiken (2005). The American Counties: Origins of County Names, Dates of Creation, and Population Data, 1950-2000. Scarecrow Press. ISBN 978-0-8108-5036-1. https://archive.org/details/americancounties0000kane. 
  4. ^ History
  5. ^ Iowa County Script error: No such module "webarchive". at Iowa State Association of Counties, retrieved July 26, 2008.
  6. ^ "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. February 12, 2011. https://www.census.gov/geographies/reference-files/time-series/geo/gazetteer-files.html. 
  7. ^ Wikisource-logo.svg "Iowa. II. An E. county of Iowa". The American Cyclopædia. 1879. 
  8. ^ "U.S. Decennial Census". United States Census Bureau. https://www.census.gov/programs-surveys/decennial-census.html. 
  9. ^ "Historical Census Browser". University of Virginia Library. http://mapserver.lib.virginia.edu. 
  10. ^ "Population of Counties by Decennial Census: 1900 to 1990". United States Census Bureau. https://www.census.gov/population/cencounts/ia190090.txt. 
  11. ^ "Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000". United States Census Bureau. https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf. 
  12. ^ "State & County QuickFacts". United States Census Bureau. http://quickfacts.census.gov/qfd/states/19/19095.html. 
  13. ^ "Population & Housing Occupancy Status 2010". United States Census Bureau American FactFinder. http://factfinder.census.gov/faces/tableservices/jsf/pages/productview.xhtml?pid=DEC_10_PL_GCTPL2.ST05&prodType=table. 
  14. ^ "U.S. Census website". United States Census Bureau. https://www.census.gov. 
  15. ^ Local and National Election Results - Election Center 2008 [1], accessed June 16, 2012.
  16. ^ Leip, David. "Dave Leip's Atlas of U.S. Presidential Elections". http://uselectionatlas.org/RESULTS. 

External links[]

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Coordinates: 41°41′10″N 92°04′01″W / 41.68611, -92.06694


This page uses content from the English language Wikipedia. The original content was at Iowa 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.
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