Northlake is located in Denton county Texas with a geographic area of 17.7 square miles. The total population in Northlake is 3,182 with 49.2% male and 50.8% female. Children under age 5 represent 6.7% of the population, under age 18 equal 20.9% of the population and over age 65 is 5.6% of the population. The median household income is $92,750, per capita income is $51,306. There are a total of 1,331 housing units with 43.7% owner occupied. Education includes 11.1% of residents that are high school graduates and 58.9% with a bachelor's degree or higher. The average temperature in Northlake in the summer is 83 degrees, and in the winter 49 degrees.