Tetonia is located in Teton county Idaho with a geographic area of 0.6 square miles. The total population in Tetonia is 369 with 41.2% male and 58.8% female. Children under age 5 represent 6.8% of the population, under age 18 equal 39.3% of the population and over age 65 is 9.2% of the population. The median household income is $48,631, per capita income is $21,883. There are a total of 137 housing units with 76.6% owner occupied. Education includes 26.3% of residents that are high school graduates and 26.3% with a bachelor's degree or higher. The average temperature in Tetonia in the summer is 60 degrees, and in the winter 24 degrees.