Oak Gulch township
- County:
- Day County
- County Seat:
- No
- Area (mi²):
- 34.583
- State:
- South Dakota
Oak Gulch township is located in Day County, South Dakota. Oak Gulch township has a 2025 population of 26. Oak Gulch township is currently growing at a rate of 4% annually and its population has increased by 13.04% since the most recent census, which recorded a population of 23 in 2020.
The median age in Oak Gulch township is 75.2 years: 0 years for males, and 0 years for females.