Dorchester is located in Cumberland county New jersey with a geographic area of 0.5 square miles. The total population in Dorchester is 222 with 51.4% male and 48.6% female. Children under age 5 represent 23.4% of the population, under age 18 equal 63.5% of the population and over age 65 is 21.2% of the population. The median household income is $20,150, per capita income is $7,800. There are a total of 81 housing units with 27.2% owner occupied. Education includes 2.5% of residents that are high school graduates and 18.5% with a bachelor's degree or higher. The average temperature in Dorchester in the summer is 73 degrees, and in the winter 34 degrees.