Editing Oskaloosa, Iowa (section)

==Demographics==
{{US Census population
|1850= 625
|1860= 4393
|1870= 3204
|1880= 4598
|1890= 6558
|1900= 9212
|1910= 9466
|1920= 9427
|1930= 10123
|1940= 11024
|1950= 11124
|1960= 11053
|1970= 11224
|1980= 10989
|1990= 10632
|2000= 10938
|2010= 11463
|2020= 11558
|footnote=U.S. Decennial Census<ref name="DecennialCensus">{{cite web|url=https://www.census.gov/programs-surveys/decennial-census.html|title=Census of Population and Housing|publisher=Census.gov|access-date=June 4, 2015}}</ref><ref name=cen2020/>
}}

===2020 census===
As of the [[United States census|census]] of 2020,<ref>{{cite web |title=2020 Census |url=https://www.census.gov/programs-surveys/decennial-census/decade/2020/2020-census-main.html |publisher=United States Census Bureau}}</ref> there were 11,558 people, 4,664 households, and 2,738 families residing in the city. The [[population density]] was 1,441.0 inhabitants per square mile (556.4/km<sup>2</sup>). There were 5,181 housing units at an average density of 646.0 per square mile (249.4/km<sup>2</sup>). The [[Race and ethnicity in the United States census|racial]] makeup of the city was 88.9% [[White Americans|White]], 3.1% [[African Americans|Black or African American]], 0.2% [[Native Americans in the United States|Native American]], 1.8% [[Asian Americans|Asian]], 0.1% [[Pacific Islander Americans|Pacific Islander]], 1.0% from other races and 4.9% from two or more races. [[Hispanic and Latino Americans|Hispanic or Latino]] persons of any race comprised 3.0% of the population.

Of the 4,664 households, 27.9% of which had children under the age of 18 living with them, 42.5% were [[Marriage|married couples]] living together, 8.1% were cohabitating couples, 29.5% had a female householder with no spouse or partner present and 19.9% had a male householder with no spouse or partner present. 41.3% of all households were non-families. 34.1% of all households were made up of individuals, 15.0% had someone living alone who was 65 years old or older.

The median age in the city was 37.3 years. 25.4% of the residents were under the age of 20; 9.2% were between the ages of 20 and 24; 23.6% were from 25 and 44; 22.5% were from 45 and 64; and 19.4% were 65 years of age or older. The gender makeup of the city was 48.6% male and 51.4% female.

===2010 census===
As of the census<ref name ="wwwcensusgov">{{cite web|title=U.S. Census website|url=https://www.census.gov|publisher=[[United States Census Bureau]]|access-date=2012-05-11}}</ref> of 2010, there were 11,463 people, 4,715 households, and 2,842 families residing in the city. The population density was {{convert|1542.8|PD/sqmi|PD/km2|1}}. There were 5,144 housing units at an average density of {{convert|692.3|/sqmi|/km2|1}}. The racial makeup of the city was 94% [[White (U.S. census)|White]], 1.5% [[African American (U.S. census)|African American]], 0.3% [[Native American (U.S. census)|Native American]], 1.5% [[Asian (U.S. census)|Asian]], 0.9% from [[Race (U.S. census)|other races]], and 1.8% from two or more races. [[Hispanic (U.S. census)|Hispanic]] or [[Latino (U.S. census)|Latino]] of any race were 2.4% of the population.

There were 4,715 households, of which 29.7% had children under the age of 18 living with them, 44.0% were married couples living together, 12.2% had a female householder with no husband present, 4.1% had a male householder with no wife present, and 39.7% were non-families. 33.3% of all households were made up of individuals, and 15.1% had someone living alone who was 65 years of age or older. The average household size was 2.30 and the average family size was 2.92.

The median age in the city was 35.8 years. 23.4% of residents were under the age of 18; 13.1% were between the ages of 18 and 24; 23.3% were from 25 to 44; 23.2% were from 45 to 64; and 17.1% were 65 years of age or older. The gender makeup of the city was 48.8% male and 51.2% female.

===2000 census===
As of the census<ref name="GR2">{{cite web|url=https://www.census.gov|publisher=[[United States Census Bureau]]|access-date=2008-01-31|title=U.S. Census website}}</ref> of 2000, there were 10,938 people, 4,603 households, and 2,863 families residing in the city. The population density was {{convert|1,593.8|PD/sqmi|PD/km2|sp=us|adj=off}}. There were 4,945 housing units at an average density of {{convert|720.5|/sqmi|/km2|sp=us|adj=off}}. The racial makeup of the city was 96.00% [[White (U.S. census)|White]], 1.04% [[African American (U.S. census)|African American]], 0.25% [[Native American (U.S. census)|Native American]], 1.32% [[Asian (U.S. census)|Asian]], 0.04% [[Pacific Islander (U.S. census)|Pacific Islander]], 0.41% from [[Race (United States census)|other races]], and 0.94% from two or more races. [[Hispanic (U.S. census)|Hispanic]] or [[Latino (U.S. census)|Latino]] of any race were 1.26% of the population.

There were 4,603 households, out of which 29.4% had children under the age of 18 living with them, 49.2% were married couples living together, 10.1% had a female householder with no husband present, and 37.8% were non-families. 32.8% of all households were made up of individuals, and 15.7% had someone living alone who was 65 years of age or older. The average household size was 2.28 and the average family size was 2.89.

Population spread: 24.1% under the age of 18, 11.2% from 18 to 24, 26.2% from 25 to 44, 19.9% from 45 to 64, and 18.5% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 94.9 males. For every 100 females age 18 and over, there were 91.3 males.

The median income for a household in the city was $34,490, and the median income for a family was $42,138. Males had a median income of $33,830 versus $23,698 for females. The per capita income for the city was $18,721. About 10.6% of families and 13.7% of the population were below the poverty line, including 18.0% of those under age 18 and 11.6% of those age 65 or over.