20 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 56537 | Fergus Falls | 19,650 |
| 56573 | Perham | 6,868 |
| 56572 | Pelican Rapids | 5,900 |
| 56567 | New York Mills | 3,247 |
| 56515 | Battle Lake | 2,782 |
| 56361 | Parkers Prairie | 2,590 |
| 56551 | Henning | 2,343 |
| 56586 | Underwood | 1,798 |
| 56571 | Ottertail | 1,761 |
| 56528 | Dent | 1,655 |
| 56587 | Vergas | 1,299 |
| 56534 | Erhard | 1,287 |
| 56324 | Dalton | 1,116 |
| 56527 | Deer Creek | 875 |
| 56576 | Richville | 858 |
| 56453 | Hewitt | 795 |
| 56524 | Clitherall | 709 |
| 56518 | Bluffton | 469 |
| 56588 | Vining | 458 |
| 56533 | Elizabeth | 333 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 20 ZCTAs in Otter Tail County, Minnesota (US Census).