Editing Sioux County, Iowa (section)

==Demographics==
{{US Census population
|1860= 10
|1870= 576
|1880= 5426
|1890= 18370
|1900= 23337
|1910= 25248
|1920= 26458
|1930= 26806
|1940= 27209
|1950= 26381
|1960= 26375
|1970= 27996
|1980= 30813
|1990= 29903
|2000= 31589
|2010= 33704
|2020= 35872
|estyear=2023
|estimate=36246
|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>
|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 20, 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 20, 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 20, 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 20, 2014}}</ref> 2010-2018<ref name="QF">{{cite web|title=State & County QuickFacts|url=http://quickfacts.census.gov/qfd/states/19/19167.html|publisher=United States Census Bureau|access-date=July 20, 2014|archive-date=June 7, 2011|archive-url=https://web.archive.org/web/20110607072711/http://quickfacts.census.gov/qfd/states/19/19167.html|url-status=dead}}</ref>
}}
[[File:SiouxCountyIowaPop2020.png|thumb|right|Population of Sioux County from US census data]]

===2020 census===
[[File:SiouxCountyIA2022PopPyr.png|thumb|left|2022 US Census [[population pyramid]] for Sioux County from [[American Community Survey|ACS]] 5-year estimates]]
The 2020 census recorded a population of 35,872 in the county, with a population density of {{Pop density|35872|768.342735|sqmi|km2}}. 93.74% of the population reported being of one race. There were 13,000 housing units, of which 12,202 were occupied.<ref name=cen2020/>
{| class="wikitable"
|+Sioux County Racial Composition<ref>{{Cite web|title =P2 HISPANIC OR LATINO, AND NOT HISPANIC OR LATINO BY RACE – 2020: DEC Redistricting Data (PL 94-171) – Sioux County, Iowa|url=https://data.census.gov/cedsci/table?q=Sioux%20County,%20Iowa&t=Race%20and%20Ethnicity&tid=DECENNIALPL2020.P2}}</ref>
!Race
!Num.
!Perc.
|-
|[[White (U.S. Census)|White]] (NH)
|29,919
|83.4%
|-
|[[African American (U.S. Census)|Black or African American]] (NH)
|184
|0.51%
|-
|[[Native American (U.S. Census)|Native American]] (NH)
|87
|0.24%
|-
|[[Asian (U.S. Census)|Asian]] (NH)
|219
|0.61%
|-
|[[Pacific Islander (U.S. Census)|Pacific Islander]] (NH)
|5
|0.01%
|-
|[[Race (United States Census)|Other/Mixed]] (NH)
|544
|1.52%
|-
|[[Hispanic (U.S. Census)|Hispanic]] or [[Latino (U.S. Census)|Latino]]
|4,914
|13.7%
|}

===2010 census===
The 2010 census recorded a population of 33,704 in the county, with a population density of {{Pop density|33704|767.88|sqmi|km2}}. There were 12,279 housing units, of which 11,584 were occupied.<ref name="USCB">{{cite web|url=http://factfinder.census.gov/faces/tableservices/jsf/pages/productview.xhtml?pid=DEC_10_PL_GCTPL2.ST05&prodType=table|title=Population and Housing Occupancy Status: 2010 - State &ndash; County|publisher=[[United States Census Bureau]] American FactFinder|access-date=March 26, 2011|archive-date=September 29, 2015|archive-url=https://web.archive.org/web/20150929225050/http://factfinder.census.gov/faces/tableservices/jsf/pages/productview.xhtml?pid=DEC_10_PL_GCTPL2.ST05&prodType=table|url-status=dead}}</ref>

===2000 census===
As of the [[census]]<ref name="GR2">{{cite web|url=https://www.census.gov|publisher=[[United States Census Bureau]]|access-date=January 31, 2008|title=U.S. Census website}}</ref> of 2000, there were 31,589 people, 10,693 households, and 8,062 families residing in the county. The [[population density]] was {{convert|41|/mi2|/km2|disp=preunit|people&nbsp;|people}}. There were 11,260 housing units at an average density of {{convert|15|/mi2|/km2|disp=preunit|units&nbsp;|units|}}. The racial makeup of the county was 97.33% [[Race (United States Census)|White]], 0.20% [[Race (United States Census)|Black]] or [[Race (United States Census)|African American]], 0.13% [[Race (United States Census)|Native American]], 0.59% [[Race (United States Census)|Asian]], 0.01% [[Race (United States Census)|Pacific Islander]], 1.20% from [[Race (United States Census)|other races]], and 0.53% from two or more races. 2.56% of the population were [[Race (United States Census)|Hispanic]] or [[Race (United States Census)|Latino]] of any race.

There were 10,693 households, out of which 36.80% had children under the age of 18 living with them, 69.40% were [[Marriage|married couples]] living together, 4.20% had a female householder with no husband present, and 24.60% were non-families. 22.20% of all households were made up of individuals, and 11.40% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 3.19.

In the county, the population was spread out, with 27.10% under the age of 18, 15.20% from 18 to 24, 23.50% from 25 to 44, 19.10% from 45 to 64, and 15.00% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 96.30 males. For every 100 females age 18 and over, there were 93.50 males.

The median income for a household in the county was $40,536, and the median income for a family was $45,846. Males had a median income of $31,548 versus $19,963 for females. The [[per capita income]] for the county was $16,532. About 4.60% of families and 6.40% of the population were below the [[poverty line]], including 7.90% of those under age 18 and 6.80% of those age 65 or over.

At one time divorce was relatively uncommon. In 1980, 52 married people in the county existed per divorced person; this rate did not exist in the total United States since the 1930s.<ref name="NYTDivorce1">{{cite news|last=Tavernise|first=Sabrina|first2=Robert|last2=Gebeloff|title=Once Rare in Rural America, Divorce Is Changing the Face of Its Families|newspaper=[[New York Times]]|date=March 23, 2011|url=https://www.nytimes.com/2011/03/24/us/24divorce.html?_r=1&WT.mc_id=NN-PS-E-OB-PS-TXT-TH-ROS-1010-NA&WT.mc_ev=click|access-date=March 24, 2011}}</ref> {{As of|2011}}, this changed to 14 married persons per divorced person.<ref name="NYTDivorce1"/>

===Religion===
{{As of|2011}}, 80% of the county residents belong to major denominational churches, compared to 36% of the total U.S. population.<ref name="NYTDivorce1"/>