A compiled list of the departments of Sumner County with their offices phone numbers. Click the department on the left to be taken to that departments dedicated page.
| Archives | 615-452-0037 |
| Assessor of Property | 615-452-2412 |
| Board of Education | 615-451-5200 |
| Building & Codes | 615-452-1467 |
| County Clerk | 615-452-4063 |
| County Mayor | 615-452-3604 |
| Courts | 615-451-5810 |
| Planning and Engineering | 615-451-6097 |
| Economic Development | 615-206-6624 |
| Election Commission | 615-452-1456 |
| Emergency Communications | 615-451-3838 |
| Emergency Management | 615-452-7584 |
| Emergency Medical Services | 615-451-0429 |
| Finance | 615-451-6033 |
| Health Department | See dedicated page |
| Risk Management | 615-451-6023 |
| Information Technology | 615-575-0511 |
| Law Director | 615-451-6060 |
| Parks | See dedicated page |
| Register of Deeds | 615-452-3892 |
| Roads | 615-452-2632 |
| Sheriff | See dedicated page |
| Tourism | 615-230-8474 |
| Trustee | 615-452-1260 |
| Veterans Services | 615-451-6014 |