Ennis is located in Madison county Montana with a geographic area of 0.7 square miles. The total population in Ennis is 721 with 52.0% male and 48.0% female. Children under age 5 represent 3.3% of the population, under age 18 equal 10.4% of the population and over age 65 is 31.3% of the population. The median household income is $46,691, per capita income is $31,456. There are a total of 383 housing units with 67.1% owner occupied. Education includes 23.8% of residents that are high school graduates and 19.6% with a bachelor's degree or higher. The average temperature in Ennis in the summer is 69 degrees, and in the winter 27 degrees.