| Place Name | Union Township (Butte County) |
| Place Type | Township |
| ZIP Code(s) | 57758 57760 |
| County | Butte County |
| Area Code(s) | 605 |
| Timezone | Mountain Standard Time (MST) |
| Population () | |
| US Congressional District(s) | South Dakota At-Large |
| State House Districts | 29 |
| State Senate Districts | 29 |