Ralston is a city in Carroll and Greene counties in the U.S. state of Iowa.

[5] According to the United States Census Bureau, the city has a total area of 1.99 square miles (5.15 km2), all land.

[6] As of the census of 2020,[8] there were 81 people, 39 households, and 23 families residing in the city.

As of the census[9] of 2010, there were 79 people, 38 households, and 19 families living in the city.

47.4% of all households were made up of individuals, and 23.7% had someone living alone who was 65 years of age or older.

As of the census[10] of 2000, there were 98 people, 39 households, and 28 families living in the city.

25.6% of all households were made up of individuals, and 12.8% had someone living alone who was 65 years of age or older.

There were no families and 0.9% of the population living below the poverty line, including no under eighteens and 16.7% of those over 64.