Lillington is located in Harnett county North carolina with a geographic area of 4.6 square miles. The total population in Lillington is 3,605 with 62.9% male and 37.1% female. Children under age 5 represent 3.6% of the population, under age 18 equal 13.8% of the population and over age 65 is 14.1% of the population. The median household income is $47,277, per capita income is $16,776. There are a total of 911 housing units with 53.5% owner occupied. Education includes 28.8% of residents that are high school graduates and 23.1% with a bachelor's degree or higher. The average temperature in Lillington in the summer is 75 degrees, and in the winter 38 degrees.