| Locality | Post Code |
|---|---|
| Alpine, Union | 38828 |
| Baldwyn, Union | 38824 |
| Blue Springs, Union | 38828 |
| Branyan, Union | 38828 |
| Center, Union | 38828 |
| Cherrycreek, Union | 38828 |
| Dumas, Union | 38625 |
| Endville, Union | 38828 |
| Etta, Union | 38627 |
| Fairfield, Union | 38828 |
| Hickory Flat, Union | 38633 |
| Ingomar, Union | 38652 |
| Jug Fork, Union | 38828 |
| Keownville, Union | 38652 |
| Mound City, Union | 38828 |
| Myrtle, Union | 38650 |
| New Albany, Union | 38652 |
| New Harmony, Union | 38828 |
| North Haven, Union | 38652 |
| Pinedale, Union | 38627 |
| Pumpkin, Union | 38652 |
| Sherman, Union | 38828 |
| Wallerville, Union | 38652 |