Orinda is located in Contra costa county California with a geographic area of 12.9 square miles. The total population in Orinda is 19,461 with 48.2% male and 51.8% female. Children under age 5 represent 4.5% of the population, under age 18 equal 24.6% of the population and over age 65 is 22.6% of the population. The median household income is $231,230, per capita income is $118,827. There are a total of 7,154 housing units with 92.8% owner occupied. Education includes 1.6% of residents that are high school graduates and 90.1% with a bachelor's degree or higher. The average temperature in Orinda in the summer is 63 degrees, and in the winter 43 degrees.
