| Locality | Post Code |
|---|---|
| Rib Falls, Marathon | 54426 |
| Rib Mountain, Marathon | 54401 |
| Ringle, Marathon | 54471 |
| Riplinger, Marathon | 54479 |
| Rothschild, Marathon | 54474 |
| Rozellville, Marathon | 54484 |
| Schofield, Marathon | 54476 |
| Spencer, Marathon | 54479 |
| Stratford, Marathon | 54484 |
| Unity, Marathon | 54488 |
| Wausau, Marathon | 54401, 54403 |
| Weston, Marathon | 54476 |
| Weurtsburg, Marathon | 54411 |
| Wittenberg, Marathon | 54432, 54499 |