Plymouth is located in Grafton county New hampshire with a geographic area of 5.9 square miles. The total population in Plymouth is 4,281 with 53.2% male and 46.8% female. Children under age 5 represent 1.0% of the population, under age 18 equal 16.2% of the population and over age 65 is 16.0% of the population. The median household income is $50,658, per capita income is $23,757. There are a total of 1,302 housing units with 63.7% owner occupied. Education includes 18.6% of residents that are high school graduates and 55.4% with a bachelor's degree or higher. The average temperature in Plymouth in the summer is 68 degrees, and in the winter 23 degrees.
