Elgin is located in Kane county Illinois with a geographic area of 38.0 square miles. The total population in Elgin is 112,062 with 50.6% male and 49.4% female. Children under age 5 represent 7.6% of the population, under age 18 equal 26.6% of the population and over age 65 is 12.2% of the population. The median household income is $72,999, per capita income is $29,423. There are a total of 36,825 housing units with 70.1% owner occupied. Education includes 21.4% of residents that are high school graduates and 27.7% with a bachelor's degree or higher. The average temperature in Elgin in the summer is 70 degrees, and in the winter 27 degrees.