Napa is located in Napa county California with a geographic area of 18.0 square miles. The total population in Napa is 78,294 with 48.9% male and 51.1% female. Children under age 5 represent 5.4% of the population, under age 18 equal 22.2% of the population and over age 65 is 17.3% of the population. The median household income is $85,953, per capita income is $41,828. There are a total of 28,232 housing units with 58.6% owner occupied. Education includes 15.2% of residents that are high school graduates and 39.1% with a bachelor's degree or higher. The average temperature in Napa in the summer is 68 degrees, and in the winter 43 degrees.