Onset is located in southeast Massachusetts. Onset is part of Plymouth County. Onset has 1.08 square miles of land area and 0.22 square miles of water area. As of 2010-2014, the total Onset population is 1,068, which has shrunk 17.34% 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%. Onset median household income is $37,171 in 2010-2014 and has grown by 18.95% 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%. Onset median house value is $265,300 in 2010-2014 and has grown by 111.90% 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 Onset is worse than the state average in quality. The Onset area code is 508.