| Business | Phone |
| Mellette County Assessments S 1st St, White River 57579 | (605) 259-3150 |
| Mellette County Extension Agnt Courthouse Dr, White River 57579 | (605) 259-3385 |
| Mellette County Register-Deeds Mckinley & State Stamp;, White River 57579 | (605) 259-3371 |