Oakley is located close to the center of California. Oakley is part of Contra Costa County. Oakley has 15.85 square miles of land area and 0.30 square miles of water area. As of 2010-2014, the total Oakley population is 37,391, which has grown 45.95% since 2000. The population growth rate is much higher than the state average rate of 12.39% and is much higher than the national average rate of 11.61%. Oakley median household income is $78,597 in 2010-2014 and has grown by 19.83% since 2000. The income growth rate is lower than the state average rate of 29.47% and is lower than the national average rate of 27.36%. Oakley median house value is $249,200 in 2010-2014 and has grown by 32.98% since 2000. The house value growth rate is much lower than the state average rate of 75.60% and is lower than the national average rate of 46.91%. As a reference, the national Consumer Price Index (CPI) inflation rate for the same period is 26.63%. On average, the public school district that covers Oakley is close to the state average in quality. The Oakley area code is 925.