Diablo is located in Contra costa county California with a geographic area of 1.4 square miles. The total population in Diablo is 834 with 48.8% male and 51.2% female. Children under age 5 represent 8.2% of the population, under age 18 equal 21.7% of the population and over age 65 is 51.8% of the population. The median household income is $250,000, per capita income is $124,760. There are a total of 358 housing units with 100.0% owner occupied. Education includes 0.0% of residents that are high school graduates and 94.1% with a bachelor's degree or higher. The average temperature in Diablo in the summer is 76 degrees, and in the winter 43 degrees.
