Melvern is located in Osage county Kansas with a geographic area of 0.4 square miles. The total population in Melvern is 368 with 44.3% male and 55.7% female. Children under age 5 represent 7.6% of the population, under age 18 equal 25.5% of the population and over age 65 is 19.6% of the population. The median household income is $45,938, per capita income is $20,658. There are a total of 143 housing units with 65.0% owner occupied. Education includes 38.5% of residents that are high school graduates and 14.0% with a bachelor's degree or higher. The average temperature in Melvern in the summer is 76 degrees, and in the winter 32 degrees.