Mendon is located in Mercer county Ohio with a geographic area of 0.6 square miles. The total population in Mendon is 643 with 50.9% male and 49.1% female. Children under age 5 represent 10.1% of the population, under age 18 equal 24.6% of the population and over age 65 is 17.6% of the population. The median household income is $51,667, per capita income is $22,800. There are a total of 256 housing units with 81.6% owner occupied. Education includes 60.9% of residents that are high school graduates and 5.9% with a bachelor's degree or higher. The average temperature in Mendon in the summer is 73 degrees, and in the winter 32 degrees.