| Locality | Post Code |
|---|---|
| Abbotsford, Marathon | 54405 |
| Aniwa, Marathon | 54408 |
| Ashley, Marathon | 54455 |
| Athens, Marathon | 54411 |
| Bevent, Marathon | 54440 |
| Brokaw, Marathon | 54417 |
| Dancy, Marathon | 54455 |
| Edgar, Marathon | 54426 |
| Eland, Marathon | 54427 |
| Elderon, Marathon | 54429 |
| Fenwood, Marathon | 54426 |
| Galloway, Marathon | 54432 |
| Halder, Marathon | 54455 |
| Hamburg, Marathon | 54411 |
| Hatley, Marathon | 54440 |
| Hogarty, Marathon | 54408 |
| Kelly, Marathon | 54476 |
| Knowlton, Marathon | 54455 |
| Kronenwetter, Marathon | 54455 |
| Little Chicago, Marathon | 54448 |
| Marathon City, Marathon | 54448 |
| Milan, Marathon | 54411 |
| Moon, Marathon | 54455 |
| Mosinee, Marathon | 54455 |
| Peplin, Marathon | 54455 |
| Poniatowski, Marathon | 54426 |