Swanzey is located in Cheshire county New hampshire with a geographic area of square miles. The total population in Swanzey is 7,219 with 49.4% male and 50.6% female. Children under age 5 represent 3.9% of the population, under age 18 equal 15.7% of the population and over age 65 is 22.5% of the population. The median household income is $59,184, per capita income is $31,279. There are a total of 3,119 housing units with 59.1% owner occupied. Education includes 32.4% of residents that are high school graduates and 31.8% with a bachelor's degree or higher. The average temperature in Swanzey in the summer is 68 degrees, and in the winter 23 degrees.