Vallejo is located in Solano county California with a geographic area of 30.4 square miles. The total population in Vallejo is 121,275 with 48.5% male and 51.5% female. Children under age 5 represent 5.6% of the population, under age 18 equal 21.0% of the population and over age 65 is 15.7% of the population. The median household income is $73,869, per capita income is $32,826. There are a total of 41,863 housing units with 57.1% owner occupied. Education includes 21.7% of residents that are high school graduates and 28.6% with a bachelor's degree or higher. The average temperature in Vallejo in the summer is 69 degrees, and in the winter 43 degrees.