Pleasanton is a city in Decatur County, Iowa, United States.

[4] It was originally called Pleasant Plain, but the name was changed to avoid confusion with another community of that same name in the state.

[6] According to the United States Census Bureau, the city has a total area of 0.35 square miles (0.91 km2), all land.

There were 18 housing units at an average density of 51.3 per square mile (19.8/km2).

Hispanic or Latino persons of any race comprised 0.0% of the population.

There were 26 housing units at an average density of 74.3 per square mile (28.7/km2).

There were 24 housing units at an average density of 69.8 per square mile (26.9/km2).

40.0% of all households were made up of individuals, and 25.0% had someone living alone who was 65 years of age or older.

There were no families and 12.5% of the population living below the poverty line, including no under eighteens and 16.7% of those over 64.