Iselin is located in northeast New Jersey. Iselin is part of Middlesex County. Iselin has 3.19 square miles of land area and 0.00 square miles of water area. As of 2010-2014, the total Iselin population is 18,457, which has grown 10.53% since 2000. The population growth rate is much higher than the state average rate of 5.47% and is lower than the national average rate of 11.61%. Iselin median household income is $80,200 in 2010-2014 and has grown by 22.58% since 2000. The income growth rate is lower than the state average rate of 30.67% and is lower than the national average rate of 27.36%. Iselin median house value is $297,600 in 2010-2014 and has grown by 97.09% since 2000. The house value growth rate is higher than the state average rate of 87.30% 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 Iselin is better than the state average in quality. The Iselin area code is 732.