South vienna is located in Clark county Ohio with a geographic area of 0.7 square miles. The total population in South vienna is 568 with 47.2% male and 52.8% female. Children under age 5 represent 4.6% of the population, under age 18 equal 20.2% of the population and over age 65 is 23.6% of the population. The median household income is $47,375, per capita income is $26,386. There are a total of 223 housing units with 52.9% owner occupied. Education includes 32.7% of residents that are high school graduates and 12.6% with a bachelor's degree or higher. The average temperature in South vienna in the summer is 73 degrees, and in the winter 32 degrees.