Colonia is located in northeast New Jersey. Colonia is part of Middlesex County. Colonia has 3.91 square miles of land area and 0.00 square miles of water area. As of 2010-2014, the total Colonia population is 17,530, which has shrunk 1.58% since 2000. The population growth rate is much lower than the state average rate of 5.47% and is much lower than the national average rate of 11.61%. Colonia median household income is $87,557 in 2010-2014 and has grown by 29.96% since 2000. The income growth rate is about the same as the state average rate of 30.67% and is higher than the national average rate of 27.36%. Colonia median house value is $344,700 in 2010-2014 and has grown by 90.65% since 2000. The house value growth rate is about the same as 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 Colonia is better than the state average in quality. The Colonia area code is 732.