Errol is located in Coos county New hampshire with a geographic area of square miles. The total population in Errol is 239 with 50.6% male and 49.4% female. Children under age 5 represent 0.0% of the population, under age 18 equal 9.6% of the population and over age 65 is 46.0% of the population. The median household income is $61,500, per capita income is $31,885. There are a total of 128 housing units with 90.6% owner occupied. Education includes 48.4% of residents that are high school graduates and 14.1% with a bachelor's degree or higher. The average temperature in Errol in the summer is 68 degrees, and in the winter 23 degrees.