Springfield is located in Sangamon county Illinois with a geographic area of 61.1 square miles. The total population in Springfield is 115,075 with 47.5% male and 52.5% female. Children under age 5 represent 6.0% of the population, under age 18 equal 21.9% of the population and over age 65 is 17.9% of the population. The median household income is $54,164, per capita income is $33,978. There are a total of 51,064 housing units with 62.9% owner occupied. Education includes 24.1% of residents that are high school graduates and 36.3% with a bachelor's degree or higher. The average temperature in Springfield in the summer is 74 degrees, and in the winter 27 degrees.
