Astoria is a town in Deuel County, South Dakota, United States.

[9] According to the United States Census Bureau, the town has a total area of 0.16 square miles (0.41 km2), all land.

There were 74 housing units at an average density of 462.5 per square mile (178.6/km2).

41.0% of all households were made up of individuals, and 9.9% had someone living alone who was 65 years of age or older.

39.1% of all households were made up of individuals, and 24.6% had someone living alone who was 65 years of age or older.

There were 17.8% of families and 19.3% of the population living below the poverty line, including 35.9% of under eighteens and 17.9% of those over 64.