| Locality | Post Code |
|---|---|
| Bethpage, Sumner | 37022 |
| Castalian Springs, Sumner | 37031 |
| Cottontown, Sumner | 37048 |
| Gallatin, Sumner | 37066 |
| Hendersonville, Sumner | 37075 |
| Mitchellville, Sumner | 37119 |
| Portland, Sumner | 37148 |
| Rock Bridge, Sumner | 37022 |
| Walnut Grove, Sumner | 37048 |
| Westmoreland, Sumner | 37186 |