Oak Gulch
- County:
- Day County
- County Seat:
- No
- Area (mi²):
- 34.583
- State:
- South Dakota
Oak Gulch is located in Day County, South Dakota. Oak Gulch has a 2025 population of 24 . Oak Gulch is currently declining at a rate of 0% annually and its population has increased by 4.35% since the most recent census, which recorded a population of 23 in 2020.
The median age in Oak Gulch is 75.2 years: 0 years for males, and 0 years for females. For every 100 females there are 25.0 males.