16 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 56721 | East Grand Forks | 10,791 |
| 56716 | Crookston | 8,991 |
| 56542 | Fosston | 2,435 |
| 56762 | Warren | 2,337 |
| 56540 | Fertile | 1,838 |
| 56556 | Mcintosh | 1,298 |
| 56535 | Erskine | 1,290 |
| 56723 | Fisher | 912 |
| 56736 | Mentor | 670 |
| 56592 | Winger | 572 |
| 56523 | Climax | 391 |
| 56722 | Euclid | 351 |
| 56646 | Gully | 343 |
| 56684 | Trail | 304 |
| 56517 | Beltrami | 256 |
| 56568 | Nielsville | 106 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 16 ZCTAs in Polk County, Minnesota (US Census).