Waipahu is located close to the center of Hawaii. Waipahu is part of Honolulu County. Waipahu has 2.80 square miles of land area and has no water area. As of 2010-2014, the total Waipahu population is 40,532, which has grown 22.42% since 2000. The population growth rate is much higher than the state average rate of 14.95% and is much higher than the national average rate of 11.61%. Waipahu median household income is $68,352 in 2010-2014 and has grown by 38.24% since 2000. The income growth rate is about the same as the state average rate of 36.89% and is higher than the national average rate of 27.36%. Waipahu median house value is $510,100 in 2010-2014 and has grown by 92.42% 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 Waipahu is much better than the state average in quality. The Waipahu area code is 808.