Tennant is located in Shelby county Iowa with a geographic area of 0.7 square miles. The total population in Tennant is 76 with 57.9% male and 42.1% female. Children under age 5 represent 2.6% of the population, under age 18 equal 19.7% of the population and over age 65 is 26.3% of the population. The median household income is $46,042, per capita income is $23,818. There are a total of 39 housing units with 94.9% owner occupied. Education includes 43.6% of residents that are high school graduates and 7.7% with a bachelor's degree or higher. The average temperature in Tennant in the summer is 72 degrees, and in the winter 23 degrees.