South union township is located in Fayette county Pennsylvania with a geographic area of square miles. The total population in South union township is 10,304 with 46.0% male and 54.0% female. Children under age 5 represent 3.8% of the population, under age 18 equal 16.9% of the population and over age 65 is 25.5% of the population. The median household income is $62,312, per capita income is $42,969. There are a total of 4,378 housing units with 81.3% owner occupied. Education includes 37.4% of residents that are high school graduates and 30.0% with a bachelor's degree or higher. The average temperature in South union township in the summer is 73 degrees, and in the winter 33 degrees.
