Waldo is located in Marion county Ohio with a geographic area of 0.6 square miles. The total population in Waldo is 362 with 48.9% male and 51.1% female. Children under age 5 represent 8.6% of the population, under age 18 equal 22.7% of the population and over age 65 is 21.0% of the population. The median household income is $53,958, per capita income is $27,427. There are a total of 164 housing units with 70.7% owner occupied. Education includes 36.6% of residents that are high school graduates and 16.5% with a bachelor's degree or higher. The average temperature in Waldo in the summer is 73 degrees, and in the winter 32 degrees.