| Locality | Post Code |
|---|---|
| Amalga, Cache | 84335 |
| Avon, Cache | 84328 |
| Benson, Cache | 84335 |
| Cache Junction, Cache | 84304 |
| Clarkston, Cache | 84305 |
| College Ward, Cache | 84339 |
| Cornish, Cache | 84308 |
| Cove, Cache | 84320 |
| Hyde Park, Cache | 84318 |
| Hyrum, Cache | 84319 |
| Lewiston, Cache | 84320 |
| Logan, Cache | 84321, 84322, 84341 |
| Mendon, Cache | 84325 |
| Millville, Cache | 84326 |
| Newton, Cache | 84327 |
| Nibley, Cache | 84321 |
| North Logan, Cache | 84341 |
| Paradise, Cache | 84328 |
| Petersboro, Cache | 84325 |
| Providence, Cache | 84332 |
| Richmond, Cache | 84333 |
| River Heights, Cache | 84321 |
| Smithfield, Cache | 84335 |
| Trenton, Cache | 84338 |
| Utida, Cache | 84308 |
| Wellsville, Cache | 84339 |