Marshfield is located in east Massachusetts. Marshfield is part of Plymouth County. Marshfield has 5.07 square miles of land area and 0.08 square miles of water area. As of 2010-2014, the total Marshfield population is 4,227, which has shrunk 0.45% since 2000. The population growth rate is much lower than the state average rate of 4.85% and is much lower than the national average rate of 11.61%. Marshfield median household income is $71,667 in 2010-2014 and has grown by 19.37% since 2000. The income growth rate is much lower than the state average rate of 34.34% and is lower than the national average rate of 27.36%. Marshfield median house value is $381,100 in 2010-2014 and has grown by 86.08% since 2000. The house value growth rate is higher than 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 Marshfield is better than the state average in quality. The Marshfield area codes are 339, 781.