Onset is located in Plymouth county Massachusetts with a geographic area of 1.1 square miles. The total population in Onset is 1,049 with 52.8% male and 47.2% female. Children under age 5 represent 0.0% of the population, under age 18 equal 8.4% of the population and over age 65 is 34.0% of the population. The median household income is $33,614, per capita income is $31,185. There are a total of 631 housing units with 58.2% owner occupied. Education includes 25.2% of residents that are high school graduates and 23.3% with a bachelor's degree or higher. The average temperature in Onset in the summer is 70 degrees, and in the winter 30 degrees.
