Black Diamond, WA
Black Diamond is located in west Washington. Black Diamond is part of King County. Black Diamond has 6.01 square miles of land area and 0.64 square miles of water area. As of 2010-2014, the total Black Diamond population is 4,257, which has grown 7.23% since 2000. The population growth rate is much lower than the state average rate of 17.05% and is lower than the national average rate of 11.61%. Black Diamond median household income is $66,951 in 2010-2014 and has has shrunk by 0.21% since 2000. The income growth rate is much lower than the state average rate of 31.72% and is much lower than the national average rate of 27.36%. Black Diamond median house value is $295,100 in 2010-2014 and has shrunk by -51.96% since 2000. The house value growth rate is about the same as the state average rate of 52.82% 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 Black Diamond is better than the state average in quality. The Black Diamond area code is 360.