Haverhill is located in Grafton county New hampshire with a geographic area of square miles. The total population in Haverhill is 4,597 with 48.0% male and 52.0% female. Children under age 5 represent 4.0% of the population, under age 18 equal 17.1% of the population and over age 65 is 20.8% of the population. The median household income is $52,611, per capita income is $31,760. There are a total of 1,806 housing units with 71.8% owner occupied. Education includes 28.7% of residents that are high school graduates and 28.4% with a bachelor's degree or higher. The average temperature in Haverhill in the summer is 68 degrees, and in the winter 23 degrees.