Landaff is located in Grafton county New hampshire with a geographic area of square miles. The total population in Landaff is 416 with 45.4% male and 54.6% female. Children under age 5 represent 3.1% of the population, under age 18 equal 15.1% of the population and over age 65 is 26.9% of the population. The median household income is $49,479, per capita income is $31,206. There are a total of 187 housing units with 81.8% owner occupied. Education includes 31.6% of residents that are high school graduates and 32.6% with a bachelor's degree or higher. The average temperature in Landaff in the summer is 68 degrees, and in the winter 23 degrees.