Clayton is located in southwest New Jersey. Clayton is part of Gloucester County. Clayton has 7.14 square miles of land area and 0.19 square miles of water area. As of 2010-2014, the total Clayton population is 8,225, which has grown 15.21% since 2000. The population growth rate is much higher than the state average rate of 5.47% and is higher than the national average rate of 11.61%. Clayton median household income is $64,183 in 2010-2014 and has grown by 20.60% since 2000. The income growth rate is lower than the state average rate of 30.67% and is lower than the national average rate of 27.36%. Clayton median house value is $179,700 in 2010-2014 and has grown by 86.60% since 2000. The house value growth rate is about the same as the state average rate of 87.30% 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 Clayton is worse than the state average in quality. The Clayton area code is 856.