Bynum is located in Teton county Montana with a geographic area of 1.6 square miles. The total population in Bynum is 25 with 60.0% male and 40.0% female. Children under age 5 represent 0.0% of the population, under age 18 equal 0.0% of the population and over age 65 is 84.0% of the population. The median household income is $39,167, per capita income is $24,540. There are a total of 14 housing units with 100.0% owner occupied. Education includes 0.0% of residents that are high school graduates and 7.1% with a bachelor's degree or higher. The average temperature in Bynum in the summer is 69 degrees, and in the winter 27 degrees.