| Business | Phone |
| Union County House Number Chng 130 Veterans St, Maynardville 37807 | (865) 992-9366 |
| Union County Investigations 901 Main St, Maynardville 37807 | (865) 992-2019 |
| Union County Maintenance Dept 435 Main St, Maynardville 37807 | (865) 992-3635 |
| Union County Register Of Deeds 901 Main St # 108, Maynardville 37807 | (865) 992-8024 |
| Union County Supt Of Roads 707 Highway 61 E, Maynardville 37807 | (865) 992-5286 |
| Union County Trustee's Office 901 Main St # 117, Maynardville 37807 | (865) 992-5943 |
| Union County Veteran's Bldg 140 Veterans St, Maynardville 37807 | (865) 992-0115 |