Owanka township
- County:
- Pennington County
- County Seat:
- No
- Area (mi²):
- 50.714
- State:
- South Dakota
Owanka township is located in Pennington County, South Dakota. Owanka township has a 2026 population of 31. Owanka township is currently declining at a rate of -3.13% annually and its population has decreased by 0% since the most recent census, which recorded a population of 31 in 2020.