Hardin is located in Big horn county Montana with a geographic area of 3.0 square miles. The total population in Hardin is 3,777 with 51.8% male and 48.2% female. Children under age 5 represent 8.9% of the population, under age 18 equal 35.3% of the population and over age 65 is 10.2% of the population. The median household income is $49,906, per capita income is $21,533. There are a total of 1,195 housing units with 54.4% owner occupied. Education includes 33.1% of residents that are high school graduates and 24.7% with a bachelor's degree or higher. The average temperature in Hardin in the summer is 71 degrees, and in the winter 27 degrees.