| Zip Code | City | Population ↓ |
|---|---|---|
| 58540 | Garrison | 2,634 |
| 58577 | Washburn | 1,954 |
| 58576 | Underwood | 1,063 |
| 58575 | Turtle Lake | 910 |
| 58759 | Max | 756 |
| 58559 | Mercer | 411 |
| 58779 | Ryder | 343 |
| 58716 | Benedict | 308 |
| 58531 | Coleharbor | 303 |
| 58723 | Butte | 244 |
| 58775 | Roseglen | 218 |
| 58565 | Riverdale | 187 |
| 58778 | Ruso | 187 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 13 ZCTAs in McLean County, North Dakota (US Census).