Warren is located in Grafton county New hampshire with a geographic area of square miles. The total population in Warren is 734 with 48.2% male and 51.8% female. Children under age 5 represent 1.8% of the population, under age 18 equal 8.7% of the population and over age 65 is 30.4% of the population. The median household income is $42,917, per capita income is $32,454. There are a total of 317 housing units with 87.1% owner occupied. Education includes 49.2% of residents that are high school graduates and 17.7% with a bachelor's degree or higher. The average temperature in Warren in the summer is 68 degrees, and in the winter 23 degrees.