Lindenhurst is located in Lake county Illinois with a geographic area of 4.5 square miles. The total population in Lindenhurst is 14,317 with 49.4% male and 50.6% female. Children under age 5 represent 6.8% of the population, under age 18 equal 26.8% of the population and over age 65 is 11.5% of the population. The median household income is $115,495, per capita income is $44,420. There are a total of 4,964 housing units with 84.0% owner occupied. Education includes 14.7% of residents that are high school graduates and 50.1% with a bachelor's degree or higher. The average temperature in Lindenhurst in the summer is 74 degrees, and in the winter 27 degrees.