Mukilteo is located in Snohomish county Washington with a geographic area of 6.3 square miles. The total population in Mukilteo is 21,414 with 47.5% male and 52.5% female. Children under age 5 represent 5.6% of the population, under age 18 equal 22.2% of the population and over age 65 is 16.0% of the population. The median household income is $102,903, per capita income is $53,006. There are a total of 8,262 housing units with 67.9% owner occupied. Education includes 16.9% of residents that are high school graduates and 52.3% with a bachelor's degree or higher. The average temperature in Mukilteo in the summer is 62 degrees, and in the winter 42 degrees.