Oceanside is located in San diego county California with a geographic area of 41.3 square miles. The total population in Oceanside is 175,694 with 49.2% male and 50.8% female. Children under age 5 represent 6.1% of the population, under age 18 equal 21.6% of the population and over age 65 is 15.5% of the population. The median household income is $75,411, per capita income is $34,768. There are a total of 61,111 housing units with 57.1% owner occupied. Education includes 17.0% of residents that are high school graduates and 35.5% with a bachelor's degree or higher. The average temperature in Oceanside in the summer is 69 degrees, and in the winter 43 degrees.