| District Name | Castlewood School District 28-1 |
| State | South Dakota |
| County | Hamlin County Deuel County Codington County |
| Statistical Area | Watertown, SD |
| Total Students (2021) | 332 |
| District Growth Rate (2017-21) | 14.1% |
| Majority Race/Ethnicty | White (93.4%) |
| Free/Reduced Lunch Program | 19.58% |