| Place Name | Mill Spring |
| Place Type | Unincorporated |
| ZIP Code(s) | 28756 |
| County | Polk County |
| Area Code(s) | 828 |
| Timezone | Eastern Standard Time (EST) |
| Population () | |
| US Congressional District(s) | North Carolina 11th |
| State House Districts | 113 |
| State Senate Districts | 48 |