Columbia is located in Coos county New hampshire with a geographic area of square miles. The total population in Columbia is 611 with 57.9% male and 42.1% female. Children under age 5 represent 0.7% of the population, under age 18 equal 15.7% of the population and over age 65 is 21.3% of the population. The median household income is $42,396, per capita income is $32,156. There are a total of 283 housing units with 88.7% owner occupied. Education includes 38.2% of residents that are high school graduates and 12.4% with a bachelor's degree or higher. The average temperature in Columbia in the summer is 68 degrees, and in the winter 23 degrees.
