Lynnfield is located in northeast Massachusetts. Lynnfield is part of Essex County. Lynnfield has 9.88 square miles of land area and 0.58 square miles of water area. As of 2010-2014, the total Lynnfield population is 12,058, which has grown 4.47% since 2000. The population growth rate is about the same as the state average rate of 4.85% and is much lower than the national average rate of 11.61%. Lynnfield median household income is $114,816 in 2010-2014 and has grown by 42.41% since 2000. The income growth rate is higher than the state average rate of 34.34% and is much higher than the national average rate of 27.36%. Lynnfield median house value is $555,700 in 2010-2014 and has grown by 69.42% since 2000. The house value growth rate is lower than the state average rate of 77.65% and is 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 Lynnfield is much better than the state average in quality. The Lynnfield area codes are 339, 781.