| Zip Code | City | Population ↓ |
|---|---|---|
| 68845 | Kearney | 20,536 |
| 68847 | Kearney | 18,354 |
| 68840 | Gibbon | 2,624 |
| 68869 | Ravenna | 2,165 |
| 68876 | Shelton | 1,910 |
| 68836 | Elm Creek | 1,908 |
| 68849 | Kearney | 1,385 |
| 68866 | Pleasanton | 1,168 |
| 68812 | Amherst | 642 |
| 68870 | Riverdale | 506 |
| 68858 | Miller | 328 |
| 68861 | Odessa | 138 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 12 ZCTAs in Buffalo County, Nebraska (US Census).