| Zip Code | City | Population ↓ |
|---|---|---|
| 56560 | Moorhead | 44,405 |
| 56549 | Hawley | 5,028 |
| 56529 | Dilworth | 4,713 |
| 56514 | Barnesville | 3,994 |
| 56547 | Glyndon | 2,762 |
| 56580 | Sabin | 1,305 |
| 56563 | Moorhead | 1,285 |
| 56585 | Ulen | 1,064 |
| 56562 | Moorhead | 528 |
| 56552 | Hitterdal | 527 |
| 56536 | Felton | 502 |
| 56546 | Georgetown | 210 |
| 56525 | Comstock | 100 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 13 ZCTAs in Clay County, Minnesota (US Census).