20 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 56537 | Fergus Falls | 19,856 |
| 56573 | Perham | 7,221 |
| 56572 | Pelican Rapids | 5,827 |
| 56567 | New York Mills | 3,367 |
| 56515 | Battle Lake | 2,723 |
| 56361 | Parkers Prairie | 2,592 |
| 56551 | Henning | 2,387 |
| 56586 | Underwood | 1,873 |
| 56571 | Ottertail | 1,745 |
| 56528 | Dent | 1,623 |
| 56587 | Vergas | 1,339 |
| 56534 | Erhard | 1,201 |
| 56324 | Dalton | 1,028 |
| 56527 | Deer Creek | 881 |
| 56453 | Hewitt | 841 |
| 56576 | Richville | 820 |
| 56524 | Clitherall | 694 |
| 56518 | Bluffton | 494 |
| 56588 | Vining | 483 |
| 56533 | Elizabeth | 286 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 20 ZCTAs in Otter Tail County, Minnesota (US Census).