| Locality | Postal Code |
|---|---|
| Cash, Poinsett | 72421 |
| Fisher, Poinsett | 72429 |
| Harrisburg, Poinsett | 72432 |
| Lepanto, Poinsett | 72354 |
| Marked Tree, Poinsett | 72365 |
| Rivervale, Poinsett | 72377 |
| Trumann, Poinsett | 72472 |
| Tyronza, Poinsett | 72386 |
| Waldenburg, Poinsett | 72475 |
| Weiner, Poinsett | 72479 |