Andover
- County:
- Day County
- County Seat:
- No
- Area (mi²):
- 0.27
- State:
- South Dakota
Andover is a town located in Day County, South Dakota. Andover has a 2026 population of 68. Andover is currently growing at a rate of 1.49% annually and its population has increased by 1.49% since the most recent census, which recorded a population of 67 in 2020.
The median household income in Andover is $68,333 with a poverty rate of 9.68%. The median age in Andover is 61.6 years: 61.5 years for males, and 61.7 years for females. For every 100 females there are 93.8 males.