Pleasant hill is located in Contra costa county California with a geographic area of 7.1 square miles. The total population in Pleasant hill is 34,903 with 48.5% male and 51.5% female. Children under age 5 represent 5.6% of the population, under age 18 equal 20.1% of the population and over age 65 is 16.5% of the population. The median household income is $125,573, per capita income is $58,074. There are a total of 13,762 housing units with 64.2% owner occupied. Education includes 9.0% of residents that are high school graduates and 58.1% with a bachelor's degree or higher. The average temperature in Pleasant hill in the summer is 70 degrees, and in the winter 43 degrees.