18 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 84321 | Logan | 49,811 |
| 84341 | Logan | 25,791 |
| 84335 | Smithfield | 16,278 |
| 84319 | Hyrum | 10,490 |
| 84332 | Providence | 8,680 |
| 84339 | Wellsville | 5,992 |
| 84318 | Hyde Park | 5,468 |
| 84333 | Richmond | 3,095 |
| 84320 | Lewiston | 2,773 |
| 84325 | Mendon | 2,311 |
| 84326 | Millville | 2,041 |
| 84328 | Paradise | 1,768 |
| 84327 | Newton | 1,026 |
| 84305 | Clarkston | 612 |
| 84338 | Trenton | 534 |
| 84308 | Cornish | 253 |
| 84304 | Cache Junction | 108 |
| 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).