Marion County, Iowa

{{For|counties with a similar name|Marion County (disambiguation)}}

{{Infobox U.S. county

| county = Marion County

| state = Iowa

| ex image = Marion County, Iowa Courthouse.jpg

| ex image size = 240px

| ex image cap = Marion County Courthouse in Knoxville

| seal =

| founded year = 1845

| founded date =

| seat wl = Knoxville

| largest city wl = Pella

| area_total_sq_mi = 571

| area_land_sq_mi = 555

| area_water_sq_mi = 16

| area percentage = 2.8

| population_as_of = 2020

| population_total = 33414

| pop_est_as_of = 2023

| population_est = 33770 {{gain}}

| density_sq_mi = auto

| time zone = Central

| web = https://www.marioncountyiowa.gov

| named for =Francis Marion

| district = 1st }}

Marion County is a county in the U.S. state of Iowa. As of the 2020 census, the population was 33,414.{{cite web |title=2020 Census State Redistricting Data |url=https://www2.census.gov/programs-surveys/decennial/2020/data/01-Redistricting_File--PL_94-171/Iowa/ |website=census.gov |publisher=United states Census Bureau |access-date=August 12, 2021}} The county seat is Knoxville.{{cite web|url=http://www.naco.org/Counties/Pages/FindACounty.aspx|access-date=June 7, 2011|title=Find a County|publisher=National Association of Counties}} It is named for Francis Marion, a brigadier general from South Carolina in the American Revolutionary War.{{cite book|last=Gannett|first=Henry|title=The Origin of Certain Place Names in the United States|url=https://archive.org/details/bub_gb_9V1IAAAAMAAJ|year=1905|publisher=U.S. Government Printing Office|page=[https://archive.org/details/bub_gb_9V1IAAAAMAAJ/page/n199 200]}}

Geography

According to the U.S. Census Bureau, the county has a total area of {{convert|571|sqmi}}, of which {{convert|555|sqmi}} is land and {{convert|16|sqmi}} (2.8%) is water.{{cite web|url=https://www.census.gov/geographies/reference-files/time-series/geo/gazetteer-files.html|publisher=United States Census Bureau|access-date=April 23, 2011|date=February 12, 2011|title=US Gazetteer files: 2010, 2000, and 1990}}

=Major highways=

=Adjacent counties=

Jasper County (north)
Mahaska County (east)
Monroe County (southeast)
Lucas County (southwest)
Warren County (west)

Demographics

{{US Census population

|1850= 5482

|1860= 16813

|1870= 24436

|1880= 25111

|1890= 23058

|1900= 24159

|1910= 22995

|1920= 24957

|1930= 25727

|1940= 27019

|1950= 25930

|1960= 25886

|1970= 26352

|1980= 29669

|1990= 30001

|2000= 32052

|2010= 33309

|2020= 33414

|estyear=2023

|estimate=33770

|estref={{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}}

|align-fn=center

|footnote=U.S. Decennial Census{{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}}
1790-1960{{cite web|url=http://mapserver.lib.virginia.edu|title=Historical Census Browser|publisher=University of Virginia Library|access-date=July 20, 2014}} 1900-1990{{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}}
1990-2000{{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}} 2010-2018{{cite web|title=State & County QuickFacts|url=http://quickfacts.census.gov/qfd/states/19/19125.html|publisher=United States Census Bureau|access-date=July 20, 2014|url-status=dead|archive-url=https://web.archive.org/web/20110607071802/http://quickfacts.census.gov/qfd/states/19/19125.html|archive-date=June 7, 2011}}

}}

File:MarionCountyIowaPop2020.png

=2020 census=

File:MarionCountyIA2022PopPyr.png for Marion County from ACS 5-year estimates]]

The 2020 census recorded a population of 33,414 in the county, with a population density of {{Pop density|33414|571.430778|sqmi|km2}}. 96.24% of the population reported being of one race. 91.15% were non-Hispanic White, 0.87% were Black, 2.09% were Hispanic, 0.21% were Native American, 1.20% were Asian, 0.06% were Native Hawaiian or Pacific Islander and 4.41% were some other race or more than one race. There were 14,073 housing units, of which 13,145 were occupied.

=2010 census=

The 2010 census recorded a population of 33,309 in the county, with a population density of {{Pop density|33309|554.21|sqmi|km2}}. There were 13,914 housing units, of which 12,723 were occupied.{{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}}

=2000 census=

As of the census{{cite web|url=https://www.census.gov|publisher=United States Census Bureau|access-date=January 31, 2008|title=U.S. Census website}} of 2000, there were 32,052 people, 12,017 households, and 8,532 families residing in the county. The population density was {{convert|58|/mi2|/km2|disp=preunit|people |people}}. There were 12,755 housing units at an average density of {{convert|23|/mi2|/km2|disp=preunit|units |units|}}. The racial makeup of the county was 97.46% White, 0.42% Black or African American, 0.19% Native American, 1.03% Asian, 0.04% Pacific Islander, 0.22% from other races, and 0.64% from two or more races. 0.80% of the population were Hispanic or Latino of any race.

There were 12,017 households, out of which 33.00% had children under the age of 18 living with them, 61.20% were married couples living together, 6.90% had a female householder with no husband present, and 29.00% were non-families. 25.60% of all households were made up of individuals, and 11.90% 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 3.02.

In the county, the population was spread out, with 25.30% under the age of 18, 10.20% from 18 to 24, 26.50% from 25 to 44, 22.10% from 45 to 64, and 15.90% who were 65 years of age or older. The median age was 37 years. For every 100 females there were 98.60 males. For every 100 females age 18 and over, there were 95.80 males.

The median income for a household in the county was $42,401, and the median income for a family was $50,052. Males had a median income of $36,460 versus $25,573 for females. The per capita income for the county was $18,717. About 5.20% of families and 7.60% of the population were below the poverty line, including 8.70% of those under age 18 and 10.80% of those age 65 or over.

Communities

=Cities=

=Unincorporated communities=

=Townships=

=Population ranking=

File:Red Rock Lake and Dam Iowa.jpg

The population ranking of the following table is based on the 2020 census of Marion County.

† county seat

class="wikitable sortable"
Rank !City/town/etc. !Municipal type !Population (2020 Census)
style="background-color:#FFFACD;" \| 1 \|Pella \| City \| 10,464
style="background-color:#FFFACD;" \| 2 \|† Knoxville \| City \| 7,595
style="background-color:#FFFACD;" \| 3 \|Pleasantville \| City \| 1,676
style="background-color:#FFFACD;" \| 4 \|Melcher-Dallas \| City \| 1,195
style="background-color:#FFFACD;" \| 5 \|Bussey \| City \| 387
style="background-color:#FFFACD;" \| 6 \|Harvey \| City \| 236
style="background-color:#FFFACD;" \| 7 \|Hamilton \| City \| 119
style="background-color:#FFFACD;" \| 8 \|Swan \| City \| 76
style="background-color:#FFFACD;" \| 9 \|Marysville \| City \| 44

class="wikitable sortable"

Rank

!City/town/etc.

!Municipal type

!Population (2020 Census)