Lebanon is located in Grafton county New hampshire with a geographic area of 40.3 square miles. The total population in Lebanon is 13,718 with 46.9% male and 53.1% female. Children under age 5 represent 6.6% of the population, under age 18 equal 16.6% of the population and over age 65 is 20.6% of the population. The median household income is $73,704, per capita income is $42,675. There are a total of 5,855 housing units with 51.3% owner occupied. Education includes 17.9% of residents that are high school graduates and 56.9% with a bachelor's degree or higher. The average temperature in Lebanon in the summer is 67 degrees, and in the winter 23 degrees.