Oneida
- County:
- Sanborn County
- County Seat:
- No
- Area (mi²):
- 35.661
- State:
- South Dakota
Oneida is located in Sanborn County, South Dakota. Oneida has a 2025 population of 25 . Oneida is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 25 in 2020.
The median age in Oneida is 79.3 years: 0 years for males, and 0 years for females. For every 100 females there are 350.0 males.