Oskaloosa is located in Jefferson county Kansas with a geographic area of 1.0 square miles. The total population in Oskaloosa is 1,229 with 51.3% male and 48.7% female. Children under age 5 represent 4.9% of the population, under age 18 equal 22.5% of the population and over age 65 is 18.1% of the population. The median household income is $54,783, per capita income is $45,452. There are a total of 522 housing units with 75.3% owner occupied. Education includes 29.3% of residents that are high school graduates and 25.5% with a bachelor's degree or higher. The average temperature in Oskaloosa in the summer is 76 degrees, and in the winter 32 degrees.