Spencer is located close to the center of Massachusetts. Spencer is part of Worcester County. Spencer has 2.11 square miles of land area and 0.06 square miles of water area. As of 2010-2014, the total Spencer population is 5,670, which has shrunk 6.00% 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%. Spencer median household income is $43,500 in 2010-2014 and has grown by 23.56% since 2000. The income growth rate is lower than the state average rate of 34.34% and is lower than the national average rate of 27.36%. Spencer median house value is $208,000 in 2010-2014 and has grown by 73.48% since 2000. The house value growth rate is lower 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 Spencer is much better than the state average in quality. The Spencer area codes are 508, 774.