| Zip Code | City | Population ↓ |
|---|---|---|
| 68979 | Sutton | 1,606 |
| 68944 | Harvard | 1,307 |
| 68933 | Clay Center | 903 |
| 68941 | Glenvil | 779 |
| 68935 | Edgar | 726 |
| 68938 | Fairfield | 490 |
| 68980 | Trumbull | 457 |
| 68975 | Saronville | 93 |
| 68452 | Ong | 87 |
| 68954 | Inland | 20 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 10 ZCTAs in Clay County, Nebraska (US Census).