Clay township is located in Ottawa county Ohio with a geographic area of square miles. The total population in Clay township is 3,472 with 49.6% male and 50.4% female. Children under age 5 represent 6.7% of the population, under age 18 equal 19.2% of the population and over age 65 is 25.9% of the population. The median household income is $51,721, per capita income is $25,812. There are a total of 1,457 housing units with 72.9% owner occupied. Education includes 37.5% of residents that are high school graduates and 22.7% with a bachelor's degree or higher. The average temperature in Clay township in the summer is 73 degrees, and in the winter 32 degrees.