Erie is located in Boulder county Colorado with a geographic area of 19.7 square miles. The total population in Erie is 27,157 with 48.5% male and 51.5% female. Children under age 5 represent 8.1% of the population, under age 18 equal 30.8% of the population and over age 65 is 10.3% of the population. The median household income is $124,480, per capita income is $46,546. There are a total of 8,912 housing units with 85.4% owner occupied. Education includes 6.7% of residents that are high school graduates and 70.8% with a bachelor's degree or higher. The average temperature in Erie in the summer is 68 degrees, and in the winter 29 degrees.