Marina is located in Monterey county California with a geographic area of 8.9 square miles. The total population in Marina is 21,966 with 47.9% male and 52.1% female. Children under age 5 represent 6.7% of the population, under age 18 equal 21.7% of the population and over age 65 is 13.8% of the population. The median household income is $73,115, per capita income is $32,645. There are a total of 7,777 housing units with 41.2% owner occupied. Education includes 17.6% of residents that are high school graduates and 32.5% with a bachelor's degree or higher. The average temperature in Marina in the summer is 62 degrees, and in the winter 43 degrees.