Oskaloosa is a city in and the county seat of Jefferson County, Kansas, United States. As of the 2010 census, the city population was 1,113.
Oskaloosa is located at 39°12′57″N 95°18′50″W / 39.21583°N 95.31389°W / 39.21583; -95.31389 (39.215849, -95.313800). It is at the intersection of U.S. Route 59 and K-92, approximately 15 miles north of Lawrence. According to the United States Census Bureau, the city has a total area of 1.03 square miles (2.67 km), of which, 1.02 square miles (2.64 km) is land and 0.01 square miles (0.03 km) is water.
Oskaloosa is part of the Topeka, Kansas Metropolitan Statistical Area.
As of the census of 2010, there were 1,113 people, 435 households, and 281 families residing in the city. The population density was 1,091.2 inhabitants per square mile (421.3/km). There were 480 housing units at an average density of 470.6 per square mile (181.7/km). The racial makeup of the city was 97.0% White, 0.2% African American, 0.8% Native American, 0.3% Asian, 0.1% from other races, and 1.6% from two or more races. Hispanic or Latino of any race were 0.9% of the population.
There were 435 households of which 33.1% had children under the age of 18 living with them, 43.2% were married couples living together, 16.8% had a female householder with no husband present, 4.6% had a male householder with no wife present, and 35.4% were non-families. 29.2% of all households were made up of individuals and 14.5% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 3.03.
The median age in the city was 39.3 years. 24.5% of residents were under the age of 18; 9% were between the ages of 18 and 24; 23.1% were from 25 to 44; 24.8% were from 45 to 64; and 18.4% were 65 years of age or older. The gender makeup of the city was 50.3% male and 49.7% female.
As of the census of 2000, there were 1,165 people, 439 households, and 291 families residing in the city. The population density was 1,281.5 people per square mile (494.3/km²). There were 478 housing units at an average density of 525.8 per square mile (202.8/km²). The racial makeup of the city was 98.03% White, 0.52% Native American, 0.69% from other races, and 0.77% from two or more races. Hispanic or Latino of any race were 1.97% of the population.
There were 439 households out of which 35.8% had children under the age of 18 living with them, 49.7% were married couples living together, 11.6% had a female householder with no husband present, and 33.5% were non-families. 29.8% of all households were made up of individuals and 15.5% had someone living alone who was 65 years of age or older. The average household size was 2.53 and the average family size was 3.14.
In the city, the population was spread out with 28.3% under the age of 18, 8.7% from 18 to 24, 26.0% from 25 to 44, 18.4% from 45 to 64, and 18.6% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 94.2 males. For every 100 females age 18 and over, there were 87.6 males.
The median income for a household in the city was $33,684, and the median income for a family was $41,477. Males had a median income of $35,043 versus $23,295 for females. The per capita income for the city was $15,677. About 9.8% of families and 13.5% of the population were below the poverty line, including 14.4% of those under age 18 and 9.4% of those age 65 or over.