Casstown is located in Miami county Ohio with a geographic area of 0.1 square miles. The total population in Casstown is 209 with 43.1% male and 56.9% female. Children under age 5 represent 10.5% of the population, under age 18 equal 31.6% of the population and over age 65 is 11.5% of the population. The median household income is $46,750, per capita income is $20,789. There are a total of 83 housing units with 71.1% owner occupied. Education includes 36.1% of residents that are high school graduates and 13.3% with a bachelor's degree or higher. The average temperature in Casstown in the summer is 73 degrees, and in the winter 32 degrees.