South franklin township is located in Washington county Pennsylvania with a geographic area of square miles. The total population in South franklin township is 3,166 with 53.3% male and 46.7% female. Children under age 5 represent 4.8% of the population, under age 18 equal 13.6% of the population and over age 65 is 25.6% of the population. The median household income is $68,661, per capita income is $36,706. There are a total of 1,415 housing units with 83.7% owner occupied. Education includes 51.0% of residents that are high school graduates and 25.3% with a bachelor's degree or higher. The average temperature in South franklin township in the summer is 73 degrees, and in the winter 33 degrees.