18 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 84321 | Logan | 49,434 |
| 84341 | Logan | 25,062 |
| 84335 | Smithfield | 15,787 |
| 84319 | Hyrum | 9,994 |
| 84332 | Providence | 8,418 |
| 84339 | Wellsville | 5,915 |
| 84318 | Hyde Park | 5,298 |
| 84333 | Richmond | 3,084 |
| 84320 | Lewiston | 2,746 |
| 84325 | Mendon | 2,263 |
| 84326 | Millville | 2,072 |
| 84328 | Paradise | 1,718 |
| 84327 | Newton | 1,041 |
| 84305 | Clarkston | 659 |
| 84338 | Trenton | 567 |
| 84308 | Cornish | 265 |
| 84304 | Cache Junction | 105 |
| 84322 | Logan | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 18 ZCTAs in Cache County, Utah (US Census).