Vista is located in San diego county California with a geographic area of 18.7 square miles. The total population in Vista is 100,659 with 50.6% male and 49.4% female. Children under age 5 represent 7.4% of the population, under age 18 equal 25.1% of the population and over age 65 is 10.7% of the population. The median household income is $73,163, per capita income is $30,781. There are a total of 30,917 housing units with 49.6% owner occupied. Education includes 21.7% of residents that are high school graduates and 29.3% with a bachelor's degree or higher. The average temperature in Vista in the summer is 71 degrees, and in the winter 43 degrees.