Yaphank is located in southeast New York. Yaphank is part of Suffolk County. Yaphank has 13.65 square miles of land area and 0.12 square miles of water area. As of 2010-2014, the total Yaphank population is 5,906, which has grown 17.53% since 2000. The population growth rate is much higher than the state average rate of 3.26% and is much higher than the national average rate of 11.61%. Yaphank median household income is $93,601 in 2010-2014 and has grown by 32.70% since 2000. The income growth rate is lower than the state average rate of 35.25% and is higher than the national average rate of 27.36%. Yaphank median house value is $298,700 in 2010-2014 and has grown by 116.29% since 2000. The house value growth rate is higher than the state average rate of 90.79% 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 Yaphank is worse than the state average in quality. The Yaphank area code is 631.