| Locality | Post Code |
|---|---|
| Annapolis, Iron | 63620 |
| Arcadia, Iron | 63621 |
| Belleview, Iron | 63623 |
| Bixby, Iron | 65439 |
| Black, Iron | 63625 |
| Caledonia, Iron | 63631 |
| Des Arc, Iron | 63636 |
| Glover, Iron | 63620 |
| Goodland, Iron | 63623 |
| Iron Mountain, Iron | 63650 |
| Ironton, Iron | 63650 |
| Middle Brook, Iron | 63656 |
| Pilot Knob, Iron | 63663 |
| Rosel, Iron | 63650 |
| Steelville, Iron | 65566 |
| Viburnum, Iron | 65566 |
| Vulcan, Iron | 63675 |