Washington township is located in Montgomery county Ohio with a geographic area of square miles. The total population in Washington township is 5,003 with 49.1% male and 50.9% female. Children under age 5 represent 6.3% of the population, under age 18 equal 20.6% of the population and over age 65 is 15.8% of the population. The median household income is $53,988, per capita income is $28,512. There are a total of 2,153 housing units with 75.1% owner occupied. Education includes 38.0% of residents that are high school graduates and 14.4% with a bachelor's degree or higher. The average temperature in Washington township in the summer is 73 degrees, and in the winter 32 degrees.