21 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 98531 | Centralia | 27,356 |
| 98532 | Chehalis | 26,531 |
| 98596 | Winlock | 7,276 |
| 98570 | Onalaska | 5,060 |
| 98591 | Toledo | 3,769 |
| 98564 | Mossyrock | 3,205 |
| 98377 | Randle | 2,555 |
| 98356 | Morton | 2,227 |
| 98593 | Vader | 1,676 |
| 98572 | Pe Ell | 806 |
| 98336 | Glenoma | 805 |
| 98533 | Cinebar | 774 |
| 98355 | Mineral | 699 |
| 98542 | Ethel | 686 |
| 98585 | Silver Creek | 607 |
| 98565 | Napavine | 484 |
| 98361 | Packwood | 388 |
| 98582 | Salkum | 366 |
| 98538 | Curtis | 333 |
| 98539 | Doty | 185 |
| 98544 | Galvin | 8 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 21 ZCTAs in Lewis County, Washington (US Census).