Diamondhead is located in south Mississippi. Diamondhead is part of Hancock County. Diamondhead has 11.09 square miles of land area and 0.59 square miles of water area. As of 2010-2014, the total Diamondhead population is 8,275, which has grown 39.97% since 2000. The population growth rate is much higher than the state average rate of 4.91% and is much higher than the national average rate of 11.61%. Diamondhead median household income is $67,138 in 2010-2014 and has grown by 30.72% since 2000. The income growth rate is higher than the state average rate of 25.96% and is higher than the national average rate of 27.36%. Diamondhead median house value is $158,700 in 2010-2014 and has grown by 17.56% since 2000. The house value growth rate is much lower than the state average rate of 41.18% and is much 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 Diamondhead is much better than the state average in quality. The Diamondhead area code is 228.