Franklin is located in Merrimack county New hampshire with a geographic area of 27.4 square miles. The total population in Franklin is 8,695 with 44.5% male and 55.5% female. Children under age 5 represent 2.6% of the population, under age 18 equal 15.2% of the population and over age 65 is 23.2% of the population. The median household income is $57,992, per capita income is $31,569. There are a total of 3,940 housing units with 65.3% owner occupied. Education includes 36.3% of residents that are high school graduates and 20.0% with a bachelor's degree or higher. The average temperature in Franklin in the summer is 67 degrees, and in the winter 23 degrees.