| Locality | Post Code |
|---|---|
| Knab, Lewis | 98591 |
| Kosmos, Lewis | 98336 |
| Lacamas, Lewis | 98570 |
| Lindberg, Lewis | 98356 |
| Littell, Lewis | 98532 |
| Marys Corner, Lewis | 98532 |
| Mineral, Lewis | 98355 |
| Morton, Lewis | 98356 |
| Mossyrock, Lewis | 98564 |
| Napavine, Lewis | 98532, 98565 |
| Newaukum, Lewis | 98532 |
| Onalaska, Lewis | 98570 |
| Packwood, Lewis | 98361 |
| Pe Ell, Lewis | 98572 |
| Randle, Lewis | 98377 |
| Saint Urbans, Lewis | 98596 |
| Salkum, Lewis | 98582 |
| Silver Creek, Lewis | 98585 |
| Toledo, Lewis | 98591 |
| Vader, Lewis | 98593 |
| Waunch Prairie, Lewis | 98531 |
| Wildwood, Lewis | 98538 |
| Winlock, Lewis | 98596 |