There are 21 zip codes in Lewis County, Washington. The most populated is 98531, located in Centralia. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
9853126,931Centralia
9853226,624Chehalis
985967,483Winlock
985704,417Onalaska
985913,667Toledo
985643,106Mossyrock
983772,392Randle
983562,367Morton
985931,449Vader
98572778Pe Ell
98355749Mineral
98542708Ethel
98533630Cinebar
98336594Glenoma
98585580Silver Creek
98565432Napavine
98361420Packwood
98538397Curtis
98582236Salkum
98539159Doty
985447Galvin

Zip Codes in Lewis County, Washington by Population (2024)