16 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 56721 | East Grand Forks | 10,905 |
| 56716 | Crookston | 9,048 |
| 56542 | Fosston | 2,434 |
| 56762 | Warren | 2,407 |
| 56540 | Fertile | 1,916 |
| 56556 | Mcintosh | 1,303 |
| 56535 | Erskine | 1,242 |
| 56723 | Fisher | 827 |
| 56736 | Mentor | 650 |
| 56592 | Winger | 527 |
| 56684 | Trail | 400 |
| 56523 | Climax | 395 |
| 56722 | Euclid | 357 |
| 56646 | Gully | 328 |
| 56517 | Beltrami | 279 |
| 56568 | Nielsville | 138 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 16 ZCTAs in Polk County, Minnesota (US Census).