De Soto is a city in Dallas County, Iowa, United States.

De Soto got its start in the year 1868, following construction of the Chicago, Rock Island and Pacific Railroad through the territory.

[4] According to the United States Census Bureau, the city has a total area of 1.52 square miles (3.94 km2), all land.

There were 379 housing units at an average density of 217.0 per square mile (83.8/km2).

Hispanic or Latino persons of any race comprised 1.7% of the population.

There were 417 housing units at an average density of 274.3 per square mile (105.9/km2).

18.8% of all households were made up of individuals, and 6% had someone living alone who was 65 years of age or older.

There were 401 housing units at an average density of 270.8 per square mile (104.6/km2).

17.4% of all households were made up of individuals, and 4.5% had someone living alone who was 65 years of age or older.