South portland is located in Cumberland county Maine with a geographic area of 12.1 square miles. The total population in South portland is 25,665 with 48.2% male and 51.8% female. Children under age 5 represent 3.5% of the population, under age 18 equal 16.6% of the population and over age 65 is 18.7% of the population. The median household income is $67,198, per capita income is $39,003. There are a total of 11,242 housing units with 64.3% owner occupied. Education includes 21.9% of residents that are high school graduates and 45.3% with a bachelor's degree or higher. The average temperature in South portland in the summer is 66 degrees, and in the winter 25 degrees.