Londonderry is located in Rockingham county New hampshire with a geographic area of 12.2 square miles. The total population in Londonderry is 12,053 with 48.5% male and 51.5% female. Children under age 5 represent 4.2% of the population, under age 18 equal 18.5% of the population and over age 65 is 15.2% of the population. The median household income is $107,813, per capita income is $43,525. There are a total of 4,463 housing units with 80.3% owner occupied. Education includes 25.4% of residents that are high school graduates and 44.4% with a bachelor's degree or higher. The average temperature in Londonderry in the summer is 68 degrees, and in the winter 23 degrees.
