Addison township is located in Somerset county Pennsylvania with a geographic area of 0.5 square miles. The total population in Addison township is 918 with 49.6% male and 50.4% female. Children under age 5 represent 5.8% of the population, under age 18 equal 20.7% of the population and over age 65 is 29.0% of the population. The median household income is $38,889, per capita income is $26,768. There are a total of 424 housing units with 83.3% owner occupied. Education includes 33.0% of residents that are high school graduates and 11.8% with a bachelor's degree or higher. The average temperature in Addison township in the summer is 73 degrees, and in the winter 33 degrees.