| Locality | Post Code |
|---|---|
| Artesia, Eddy | 88210 |
| Atoka, Eddy | 88210 |
| Carlsbad, Eddy | 88220, 88221 |
| Carlsbad Caverns National Park, Eddy | 88220 |
| Happy Valley, Eddy | 88220 |
| Hope, Eddy | 88250 |
| Lakewood, Eddy | 88254 |
| Loco Hills, Eddy | 88255 |
| Loving, Eddy | 88256 |
| Malaga, Eddy | 88263 |
| Seven Rivers, Eddy | 88254 |
| Whites City, Eddy | 88268 |