Cottage grove is located in Henry county Tennessee with a geographic area of 0.2 square miles. The total population in Cottage grove is 59 with 45.8% male and 54.2% female. Children under age 5 represent 6.8% of the population, under age 18 equal 16.9% of the population and over age 65 is 18.6% of the population. The median household income is $43,036, per capita income is $21,954. There are a total of 25 housing units with 80.0% owner occupied. Education includes 48.0% of residents that are high school graduates and 28.0% with a bachelor's degree or higher. The average temperature in Cottage grove in the summer is 77 degrees, and in the winter 38 degrees.