Iowa County, Iowa: Difference between revisions

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  | population_as_of    = 2020
  | population_as_of    = 2020
  | population_total    = 16662
  | population_total    = 16662
  | pop_est_as_of        = 2023
  | pop_est_as_of        = 2024
  | population_est      = 16381 {{loss}}
  | population_est      = 16423 {{gain}}
  | density_sq_mi = auto
  | density_sq_mi = auto
  | time zone          = Central
  | time zone          = Central
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|2010= 16355
|2010= 16355
|2020= 16662
|2020= 16662
|estyear=2023
|estyear=2024
|estimate=16381
|estimate=16423
|estref=<ref name="USCensusEst2023">{{cite web|url=https://www.census.gov/programs-surveys/popest/data/tables.html|title=Annual Estimates of the Resident Population for Counties: April 1, 2020 to July 1, 2023|publisher=United States Census Bureau|access-date=April 2, 2024}}</ref>
|estref=<ref name="USCensusEst2024">{{cite web|url=https://www.census.gov/programs-surveys/popest/data/tables.html|title=Population and Housing Unit Estimates Tables|publisher=United States Census Bureau|access-date=July 24, 2025}}</ref>
|align-fn=center
|align-fn=center
|footnote=U.S. Decennial Census<ref>{{cite web|url=https://www.census.gov/programs-surveys/decennial-census.html|title=U.S. Decennial Census|publisher=United States Census Bureau|access-date=July 17, 2014}}</ref><br />1790-1960<ref>{{cite web|url=http://mapserver.lib.virginia.edu|title=Historical Census Browser|publisher=University of Virginia Library|access-date=July 17, 2014}}</ref> 1900-1990<ref>{{cite web|url=https://www.census.gov/population/cencounts/ia190090.txt|title=Population of Counties by Decennial Census: 1900 to 1990|publisher=United States Census Bureau|access-date=July 17, 2014}}</ref><br />1990-2000<ref>{{cite web|url=https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-url=https://web.archive.org/web/20100327165705/http://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-date=March 27, 2010 |url-status=live|title=Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000|publisher=United States Census Bureau|access-date=July 17, 2014}}</ref> 2010-2018<ref name="QF">{{cite web|title=State & County QuickFacts|url=http://quickfacts.census.gov/qfd/states/19/19095.html|publisher=United States Census Bureau|access-date=July 17, 2014|url-status=dead|archive-url=https://web.archive.org/web/20110607070135/http://quickfacts.census.gov/qfd/states/19/19095.html|archive-date=June 7, 2011}}</ref>  
|footnote=U.S. Decennial Census<ref>{{cite web|url=https://www.census.gov/programs-surveys/decennial-census.html|title=U.S. Decennial Census|publisher=United States Census Bureau|access-date=July 17, 2014}}</ref><br />1790-1960<ref>{{cite web|url=http://mapserver.lib.virginia.edu|title=Historical Census Browser|publisher=University of Virginia Library|access-date=July 17, 2014}}</ref> 1900-1990<ref>{{cite web|url=https://www.census.gov/population/cencounts/ia190090.txt|title=Population of Counties by Decennial Census: 1900 to 1990|publisher=United States Census Bureau|access-date=July 17, 2014}}</ref><br />1990-2000<ref>{{cite web|url=https://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-url=https://web.archive.org/web/20100327165705/http://www.census.gov/population/www/cen2000/briefs/phc-t4/tables/tab02.pdf |archive-date=March 27, 2010 |url-status=live|title=Census 2000 PHC-T-4. Ranking Tables for Counties: 1990 and 2000|publisher=United States Census Bureau|access-date=July 17, 2014}}</ref> 2010-2018<ref name="QF">{{cite web|title=State & County QuickFacts|url=http://quickfacts.census.gov/qfd/states/19/19095.html|publisher=United States Census Bureau|access-date=July 17, 2014|url-status=dead|archive-url=https://web.archive.org/web/20110607070135/http://quickfacts.census.gov/qfd/states/19/19095.html|archive-date=June 7, 2011}}</ref>  
| align = right
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[[File:IowaCountyIowaPop2020.png|thumb|right|Population of Iowa County from US census data]]
[[File:IowaCountyIowaPop2020.png|thumb|right|Population of Iowa County from US census data]]
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===2020 census===
===2020 census===
[[File:IowaCountyIA2022PopPyr.png|thumb|right|A 2022 US Census [[population pyramid]] for Iowa County from [[American Community Survey|ACS]] 5-year estimates]]
[[File:IowaCountyIA2022PopPyr.png|thumb|right|A 2022 US Census [[population pyramid]] for Iowa County from [[American Community Survey|ACS]] 5-year estimates]]
The 2020 census recorded a population of 16,662 in the county, with a population density of {{Pop density|16662|586.874853|sqmi|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.<ref name=cen2020/>
As of the [[2020 United States census|2020 census]], the county had a population of 16,662, a population density of {{Pop density|16662|586.874853|sqmi|km2|prec=1}}, and 96.24% of residents reported being of one race. The median age was 42.6 years; 23.4% of residents were under the age of 18 and 19.8% were 65 years of age or older. For every 100 females there were 98.8 males, and for every 100 females age 18 and over there were 95.9 males age 18 and over.<ref name="Census2020DP">{{cite web|title=2020 Decennial Census Demographic Profile (DP1)|url=https://api.census.gov/data/2020/dec/dp?get=NAME,DP1_0021P,DP1_0024P,DP1_0025C,DP1_0049C,DP1_0045C,DP1_0069C,DP1_0073C,DP1_0125P,DP1_0126P,DP1_0129P,DP1_0133P,DP1_0137P,DP1_0138P,DP1_0139P,DP1_0141P,DP1_0142P,DP1_0143P,DP1_0145P,DP1_0146P,DP1_0147C,DP1_0148C,DP1_0149C,DP1_0156C,DP1_0157C,DP1_0158C,DP1_0159P,DP1_0160P&for=county%3A095&in=state%3A19|website=United States Census Bureau|year=2021|access-date=December 25, 2025|df=mdy}}</ref>
 
The racial makeup of the county was 93.5% [[White Americans|White]], 0.7% [[African Americans|Black or African American]], 0.2% [[Native Americans in the United States|American Indian and Alaska Native]], 0.6% [[Asian Americans|Asian]], <0.1% [[Native Hawaiians|Native Hawaiian]] and [[Pacific Islander|Pacific Islander]], 1.3% from some other race, and 3.8% from [[Multiracial Americans|two or more races]]. [[Hispanic and Latino Americans|Hispanic or Latino]] residents of any race comprised 3.0% of the population.<ref name="Census2020PL">{{cite web|title=2020 Decennial Census Redistricting Data (Public Law 94-171)|url=https://api.census.gov/data/2020/dec/pl?get=NAME,P1_001N,P1_003N,P1_004N,P1_005N,P1_006N,P1_007N,P1_008N,P1_009N,P2_001N,P2_002N,H1_001N,H1_002N&for=county%3A095&in=state%3A19|website=United States Census Bureau|year=2021|access-date=December 25, 2025|df=mdy}}</ref>
 
<0.1% of residents lived in urban areas, while 100.0% lived in rural areas.<ref name="Census2020DHC">{{cite web|title=2020 Decennial Census Demographic and Housing Characteristics (DHC)|url=https://api.census.gov/data/2020/dec/dhc?get=NAME,P2_002N,P2_003N&for=county%3A095&in=state%3A19|website=United States Census Bureau|year=2023|access-date=December 25, 2025|df=mdy}}</ref>
 
There were 6,811 households in the county, of which 28.9% had children under the age of 18 living in them. Of all households, 55.3% were married-couple households, 16.9% were households with a male householder and no spouse or partner present, and 21.6% were households with a female householder and no spouse or partner present. About 28.7% of all households were made up of individuals and 13.7% had someone living alone who was 65 years of age or older.<ref name="Census2020DP"/>
 
There were 7,341 housing units, of which 6,811 were occupied; 7.2% were vacant. Among occupied housing units, 79.1% were owner-occupied and 20.9% were renter-occupied. The homeowner vacancy rate was 1.5% and the rental vacancy rate was 8.6%.<ref name="Census2020DP"/>


===2010 census===
===2010 census===
The 2010 census recorded a population of 16,355 in the county, with a population density of {{Pop density|16355|586.45|sqmi|km2}}. There were 7,258 housing units, of which 6,677 were occupied.<ref>{{cite web|url=https://www2.census.gov/library/publications/decennial/2010/cph-2/cph-2-17.pdf |archive-url=https://web.archive.org/web/20201016010401/https://www2.census.gov/library/publications/decennial/2010/cph-2/cph-2-17.pdf |archive-date=October 16, 2020 |url-status=live|title=Population & Housing Occupancy Status 2010|publisher=[[United States Census Bureau]] American FactFinder|access-date=August 15, 2022}}</ref>
The 2010 census recorded a population of 16,355 in the county, with a population density of {{Pop density|16355|586.45|sqmi|km2|prec=1}}. There were 7,258 housing units, of which 6,677 were occupied.<ref>{{cite web|url=https://www2.census.gov/library/publications/decennial/2010/cph-2/cph-2-17.pdf |archive-url=https://web.archive.org/web/20201016010401/https://www2.census.gov/library/publications/decennial/2010/cph-2/cph-2-17.pdf |archive-date=October 16, 2020 |url-status=live|title=Population & Housing Occupancy Status 2010|publisher=[[United States Census Bureau]] American FactFinder|access-date=August 15, 2022}}</ref>


===2000 census===
===2000 census===
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===Census-designated places===
===Census-designated places===
*[[Amana, Iowa|Amana]]
*[[Amana (CDP), Iowa|Amana]]
*[[Conroy, Iowa|Conroy]]
*[[Conroy, Iowa|Conroy]]
*[[East Amana, Iowa|East Amana]]
*[[East Amana, Iowa|East Amana]]
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|'''[[Amana, Iowa|Amana]]'''  
|'''[[Amana (CDP), Iowa|Amana]]'''  
| CDP
| CDP
| 388
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{{Iowa County, Iowa}}
{{Iowa County, Iowa}}
{{Iowa}}
{{Iowa}}
 
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[[Category:Iowa County, Iowa| ]]
[[Category:Iowa County, Iowa| ]]
[[Category:1843 establishments in Iowa Territory]]
[[Category:1843 establishments in Iowa Territory]]
[[Category:Populated places established in 1843]]
[[Category:Populated places established in 1843]]

Latest revision as of 06:44, 26 December 2025

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Iowa County is a county 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 in which they are located. 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. It 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 Script error: No such module "convert"., of which Script error: No such module "convert". is land and Script error: No such module "convert". (0.2%) is water.[6] The county is intersected by the Iowa River and the north fork of the English River.[7]

Major highways

Adjacent counties

Demographics

<templatestyles src="US Census population/styles.css"/>

Historical population
CensusPop.Template:Sronly%±
1850822—
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201016,355Script error: No such module "String".%
202016,662Script error: No such module "String".%
2024 (est.)16,423[8]Script error: No such module "String".%
U.S. Decennial Census[9]
1790-1960[10] 1900-1990[11]
1990-2000[12] 2010-2018[13]

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File:IowaCountyIowaPop2020.png
Population of Iowa County from US census data

2020 census

File:IowaCountyIA2022PopPyr.png
A 2022 US Census population pyramid for Iowa County from ACS 5-year estimates

As of the 2020 census, the county had a population of 16,662, a population density of Template:Pop density, and 96.24% of residents reported being of one race. The median age was 42.6 years; 23.4% of residents were under the age of 18 and 19.8% were 65 years of age or older. For every 100 females there were 98.8 males, and for every 100 females age 18 and over there were 95.9 males age 18 and over.[14]

The racial makeup of the county was 93.5% White, 0.7% Black or African American, 0.2% American Indian and Alaska Native, 0.6% Asian, <0.1% Native Hawaiian and Pacific Islander, 1.3% from some other race, and 3.8% from two or more races. Hispanic or Latino residents of any race comprised 3.0% of the population.[15]

<0.1% of residents lived in urban areas, while 100.0% lived in rural areas.[16]

There were 6,811 households in the county, of which 28.9% had children under the age of 18 living in them. Of all households, 55.3% were married-couple households, 16.9% were households with a male householder and no spouse or partner present, and 21.6% were households with a female householder and no spouse or partner present. About 28.7% of all households were made up of individuals and 13.7% had someone living alone who was 65 years of age or older.[14]

There were 7,341 housing units, of which 6,811 were occupied; 7.2% were vacant. Among occupied housing units, 79.1% were owner-occupied and 20.9% were renter-occupied. The homeowner vacancy rate was 1.5% and the rental vacancy rate was 8.6%.[14]

2010 census

The 2010 census recorded a population of 16,355 in the county, with a population density of Template:Pop density. There were 7,258 housing units, of which 6,677 were occupied.[17]

2000 census

As of the census[18] of 2000, there were 15,671 people, 6,163 households, and 4,301 families residing in the county. The population density was Script error: No such module "convert".. There were 6,545 housing units at an average density of Script error: No such module "convert".. 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

Script error: No such module "Unsubst". In the 2008 US presidential election, a nearly equal number of Iowa County voters voted for each major candidate, with Barack Obama winning the county by a narrow margin of 14 votes.[19]

In the 2012 US presidential election, Mitt Romney received 4,551 votes (51.8%).[20] In the 2016 US presidential election, Donald Trump received 5,193 votes (59.1%).[21] In the 2020 US presidential election, Donald Trump received 6,009 votes (61.8%).[22] In the 2024 US presidential election, Donald Trump received 6,068 votes (63.0%).

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Communities

Cities

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Census-designated places

Other unincorporated communities

  • Ambrose
  • Armah
  • Genoa Bluff
  • Holbrook
  • Koszta
  • Upper South Amana

Townships

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Population ranking

Population rankings 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

These public school districts are in Iowa County:

See also

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References

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  1. ↑ a b Script error: No such module "citation/CS1".
  2. ↑ Script error: No such module "citation/CS1".
  3. ↑ Script error: No such module "citation/CS1".
  4. ↑ History
  5. ↑ Iowa County Template:Webarchive at Iowa State Association of Counties, retrieved July 26, 2008.
  6. ↑ Script error: No such module "citation/CS1".
  7. ↑ Template:Cite AmCyc
  8. ↑ Script error: No such module "citation/CS1".
  9. ↑ Script error: No such module "citation/CS1".
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  12. ↑ Script error: No such module "citation/CS1".
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ a b c Script error: No such module "citation/CS1".
  15. ↑ Script error: No such module "citation/CS1".
  16. ↑ Script error: No such module "citation/CS1".
  17. ↑ Script error: No such module "citation/CS1".
  18. ↑ Script error: No such module "citation/CS1".
  19. ↑ Local and National Election Results - Election Center 2008 [1], accessed June 16, 2012.
  20. ↑ Script error: No such module "citation/CS1".
  21. ↑ Script error: No such module "citation/CS1".
  22. ↑ Script error: No such module "citation/CS1".

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External links

Template:Sister project

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