Kailua is located close to the center of Hawaii. Kailua is part of Honolulu County. Kailua has 35.63 square miles of land area and 4.26 square miles of water area. As of 2010-2014, the total Kailua population is 12,727, which has grown 28.95% 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%. Kailua median household income is $56,429 in 2010-2014 and has grown by 38.06% 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%. Kailua median house value is $366,300 in 2010-2014 and has grown by 91.88% 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 Kailua is much better than the state average in quality. The Kailua area code is 808.