Cornelius is located in Mecklenburg county North carolina with a geographic area of 12.6 square miles. The total population in Cornelius is 29,836 with 48.7% male and 51.3% female. Children under age 5 represent 3.6% of the population, under age 18 equal 22.8% of the population and over age 65 is 16.8% of the population. The median household income is $90,377, per capita income is $59,348. There are a total of 12,363 housing units with 71.5% owner occupied. Education includes 11.1% of residents that are high school graduates and 55.7% with a bachelor's degree or higher. The average temperature in Cornelius in the summer is 75 degrees, and in the winter 38 degrees.