21 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 98531 | Centralia | 27,337 |
| 98532 | Chehalis | 27,135 |
| 98596 | Winlock | 6,950 |
| 98570 | Onalaska | 5,319 |
| 98591 | Toledo | 3,965 |
| 98564 | Mossyrock | 3,382 |
| 98377 | Randle | 2,527 |
| 98356 | Morton | 2,172 |
| 98593 | Vader | 1,541 |
| 98336 | Glenoma | 981 |
| 98533 | Cinebar | 890 |
| 98572 | Pe Ell | 834 |
| 98355 | Mineral | 702 |
| 98542 | Ethel | 625 |
| 98565 | Napavine | 568 |
| 98585 | Silver Creek | 465 |
| 98538 | Curtis | 460 |
| 98361 | Packwood | 457 |
| 98582 | Salkum | 438 |
| 98539 | Doty | 139 |
| 98544 | Galvin | 0 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 21 ZCTAs in Lewis County, Washington (US Census).