Star Valley
- County:
- Tripp County
- County Seat:
- No
- Area (mi²):
- 41.982
- State:
- South Dakota
Star Valley is located in Tripp County, South Dakota. Star Valley has a 2025 population of 24 . Star Valley 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 24 in 2020.