Clay township is located in St. clair county Michigan with a geographic area of square miles. The total population in Clay township is 8,870 with 51.9% male and 48.1% female. Children under age 5 represent 4.8% of the population, under age 18 equal 16.1% of the population and over age 65 is 26.9% of the population. The median household income is $61,750, per capita income is $38,700. There are a total of 4,107 housing units with 89.7% owner occupied. Education includes 26.4% of residents that are high school graduates and 23.0% with a bachelor's degree or higher. The average temperature in Clay township in the summer is 67 degrees, and in the winter 23 degrees.