Salem is located in Rockingham county New hampshire with a geographic area of square miles. The total population in Salem is 29,633 with 49.9% male and 50.1% female. Children under age 5 represent 4.6% of the population, under age 18 equal 16.9% of the population and over age 65 is 19.5% of the population. The median household income is $90,673, per capita income is $46,380. There are a total of 11,885 housing units with 77.8% owner occupied. Education includes 27.2% of residents that are high school graduates and 40.6% with a bachelor's degree or higher. The average temperature in Salem in the summer is 68 degrees, and in the winter 23 degrees.