Holyoke is located in west Massachusetts. Holyoke is part of Hampden County. Holyoke has 21.28 square miles of land area and 1.55 square miles of water area. As of 2010-2014, the total Holyoke population is 40,079, which has grown 0.60% since 2000. The population growth rate is lower than the state average rate of 4.85% and is much lower than the national average rate of 11.61%. Holyoke median household income is $35,550 in 2010-2014 and has grown by 16.78% since 2000. The income growth rate is much lower than the state average rate of 34.34% and is much lower than the national average rate of 27.36%. Holyoke median house value is $186,100 in 2010-2014 and has grown by 76.23% 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 Holyoke is worse than the state average in quality. The Holyoke area code is 413.