Lafayette is located in west California. Lafayette is part of Contra Costa County. Lafayette has 15.22 square miles of land area and 0.17 square miles of water area. As of 2010-2014, the total Lafayette population is 24,685, which has grown 3.25% 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%. Lafayette median household income is $138,073 in 2010-2014 and has grown by 35.22% since 2000. The income growth rate is higher than the state average rate of 29.47% and is higher than the national average rate of 27.36%. Lafayette median house value is $999,100 in 2010-2014 and has grown by 71.37% since 2000. The house value growth rate is lower than the state average rate of 75.60% and is much 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 Lafayette is much better than the state average in quality. The Lafayette area code is 925.