Chelsea is located close to the center of Massachusetts. Chelsea is part of Suffolk County. Chelsea has 2.21 square miles of land area and 0.25 square miles of water area. As of 2010-2014, the total Chelsea population is 37,084, which has grown 5.71% since 2000. The population growth rate is higher than the state average rate of 4.85% and is much lower than the national average rate of 11.61%. Chelsea median household income is $48,725 in 2010-2014 and has grown by 61.55% since 2000. The income growth rate is much higher than the state average rate of 34.34% and is much higher than the national average rate of 27.36%. Chelsea median house value is $261,200 in 2010-2014 and has grown by 75.07% since 2000. The house value growth rate is about the same as the state average rate of 77.65% 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 Chelsea is worse than the state average in quality. The Chelsea area code is 617.