| Business | Phone |
| Barn 730 Grove St, Barnesville 30204 | (770) 358-5150 |
| Lamar County Commissioner Ofc 326 Thomaston St, Barnesville 30204 | (770) 358-5146 |
| Lamar County Extension Office 118 Academy Dr A, Barnesville 30204 | (770) 358-5163 |
| Lamar County Landfill 172 Roger Brown Dr, Barnesville 30204 | (770) 358-5215 |
| Recycling Center-Barnesville 122 Academy Dr, Barnesville 30204 | (770) 358-6108 |
| Lamar County Registrar 130 Library St, Barnesville 30204 | (770) 358-5235 |