Summerville is located in Union county Oregon with a geographic area of 0.3 square miles. The total population in Summerville is 144 with 54.2% male and 45.8% female. Children under age 5 represent 0.0% of the population, under age 18 equal 18.8% of the population and over age 65 is 24.3% of the population. The median household income is $53,750, per capita income is $25,028. There are a total of 55 housing units with 89.1% owner occupied. Education includes 38.2% of residents that are high school graduates and 29.1% with a bachelor's degree or higher. The average temperature in Summerville in the summer is 68 degrees, and in the winter 35 degrees.