| Business | Phone |
| Waste Convenience Station Erwin 37650 | (423) 743-1995 |
| Unicoi County Agriculture 100 N Main Ave # 108, Erwin 37650 | (423) 743-9584 |
| Unicoi County Executive 100 N Main Ave # 102, Erwin 37650 | (423) 743-9391 |
| Unicoi County Human Dev Corp 109 Gay St, Erwin 37650 | (423) 743-4103 |
| Unicoi Election Commission 102 N Main Ave, Erwin 37650 | (423) 743-6521 |
| Unicoi Register Of Deeds 100 N Main Ave, Erwin 37650 | (423) 743-6104 |
| Unicoi Trustee's Office 100 N Main Ave, Erwin 37650 | (423) 743-3011 |
| Unicoi Waste Convenience Sta Higgins Crk, Erwin 37650 | (423) 743-7210 |
| Highway Garage Dept 125 N Industrial Dr, Erwin 37650 | (423) 743-7711 |