Koshkonong is located in Oregon county Missouri with a geographic area of 0.2 square miles. The total population in Koshkonong is 153 with 49.0% male and 51.0% female. Children under age 5 represent 8.5% of the population, under age 18 equal 34.0% of the population and over age 65 is 8.5% of the population. The median household income is $26,250, per capita income is $27,056. There are a total of 47 housing units with 63.8% owner occupied. Education includes 29.8% of residents that are high school graduates and 4.3% with a bachelor's degree or higher. The average temperature in Koshkonong in the summer is 77 degrees, and in the winter 32 degrees.