Andover is a town in northwestern Day County, South Dakota, United States.

[8] According to the United States Census Bureau, the town has a total area of 0.27 square miles (0.70 km2), all land.

The racial makeup of the town was 86.4% White and Hispanic or Latino of any race were 6% of the population.

40.5% of all households were made up of individuals, and 26.2% had someone living alone who was 65 years of age or older.

There were 11.1% of families and 18.5% of the population living below the poverty line, including no under eighteens and 17.6% of those over 64.

Media related to Andover, South Dakota at Wikimedia Commons