Bethlehem is located in Grafton county New hampshire with a geographic area of 1.6 square miles. The total population in Bethlehem is 1,061 with 45.7% male and 54.3% female. Children under age 5 represent 3.0% of the population, under age 18 equal 16.5% of the population and over age 65 is 17.2% of the population. The median household income is $39,910, per capita income is $24,508. There are a total of 496 housing units with 80.4% owner occupied. Education includes 15.5% of residents that are high school graduates and 33.7% with a bachelor's degree or higher. The average temperature in Bethlehem in the summer is 68 degrees, and in the winter 23 degrees.