Grafton is located in Grafton county New hampshire with a geographic area of square miles. The total population in Grafton is 1,293 with 54.0% male and 46.0% female. Children under age 5 represent 6.5% of the population, under age 18 equal 17.9% of the population and over age 65 is 19.6% of the population. The median household income is $66,176, per capita income is $34,048. There are a total of 512 housing units with 92.8% owner occupied. Education includes 32.2% of residents that are high school graduates and 29.3% with a bachelor's degree or higher. The average temperature in Grafton in the summer is 68 degrees, and in the winter 23 degrees.