Harrison is located in Madison county Montana with a geographic area of 0.2 square miles. The total population in Harrison is 64 with 60.9% male and 39.1% female. Children under age 5 represent 14.1% of the population, under age 18 equal 21.9% of the population and over age 65 is 9.4% of the population. The median household income is $41,458, per capita income is $22,605. There are a total of 25 housing units with 60.0% owner occupied. Education includes 72.0% of residents that are high school graduates and 16.0% with a bachelor's degree or higher. The average temperature in Harrison in the summer is 69 degrees, and in the winter 27 degrees.