Tetonka
- County:
- Spink County
- County Seat:
- No
- Area (mi²):
- 58.774
- State:
- South Dakota
Tetonka is located in Spink County, South Dakota. Tetonka has a 2025 population of 42 . Tetonka is currently growing at a rate of 2.44% annually but its population has decreased by -2.33% since the most recent census, which recorded a population of 43 in 2020.
The median age in Tetonka is 69 years: 65.8 years for males, and 72.1 years for females. For every 100 females there are 60.0 males.