Wainaku is located close to the center of Hawaii. Wainaku has 1.32 square miles of land area and 0.15 square miles of water area. As of 2010-2014, the total Wainaku population is 1,445, which has grown 17.77% since 2000. The population growth rate is higher than the state average rate of 14.95% and is much higher than the national average rate of 11.61%. Wainaku median household income is $37,188 in 2010-2014 and has has shrunk by 12.07% since 2000. The income growth rate is much lower than the state average rate of 36.89% and is much lower than the national average rate of 27.36%. Wainaku median house value is $253,100 in 2010-2014 and has shrunk by -95.75% since 2000. The house value growth rate is higher than the state average rate of 85.00% 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 Wainaku is much better than the state average in quality.