Vacaville is located in Solano county California with a geographic area of 29.9 square miles. The total population in Vacaville is 99,958 with 52.2% male and 47.8% female. Children under age 5 represent 6.0% of the population, under age 18 equal 22.3% of the population and over age 65 is 14.7% of the population. The median household income is $93,291, per capita income is $38,532. There are a total of 33,026 housing units with 65.2% owner occupied. Education includes 18.8% of residents that are high school graduates and 29.0% with a bachelor's degree or higher. The average temperature in Vacaville in the summer is 76 degrees, and in the winter 43 degrees.