Orinda is located in west California. Orinda is part of Contra Costa County. Orinda has 12.68 square miles of land area and 0.01 square miles of water area. As of 2010-2014, the total Orinda population is 18,390, which has grown 4.49% since 2000. The population growth rate is much lower than the state average rate of 12.39% and is much lower than the national average rate of 11.61%. Orinda median household income is $166,866 in 2010-2014 and has grown by 41.85% since 2000. The income growth rate is higher than the state average rate of 29.47% and is much higher than the national average rate of 27.36%. Orinda median house value is $987,200 in 2010-2014 and has grown by 56.25% since 2000. The house value growth rate is lower than the state average rate of 75.60% and is higher 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 Orinda is much better than the state average in quality. The Orinda area code is 925.