De soto is located in Dallas county Iowa with a geographic area of 1.7 square miles. The total population in De soto is 987 with 48.2% male and 51.8% female. Children under age 5 represent 8.1% of the population, under age 18 equal 32.0% of the population and over age 65 is 13.6% of the population. The median household income is $73,021, per capita income is $29,563. There are a total of 377 housing units with 83.3% owner occupied. Education includes 34.7% of residents that are high school graduates and 29.2% with a bachelor's degree or higher. The average temperature in De soto in the summer is 72 degrees, and in the winter 23 degrees.