Markleville is located in Madison county Indiana with a geographic area of 0.6 square miles. The total population in Markleville is 527 with 44.8% male and 55.2% female. Children under age 5 represent 3.6% of the population, under age 18 equal 28.1% of the population and over age 65 is 12.3% of the population. The median household income is $75,625, per capita income is $25,655. There are a total of 189 housing units with 80.4% owner occupied. Education includes 29.1% of residents that are high school graduates and 6.9% with a bachelor's degree or higher. The average temperature in Markleville in the summer is 73 degrees, and in the winter 29 degrees.