Lewis County, Washington
County seat: Chehalis · Population 88,062 (2025) · 2,403 sq mi
Lewis County is the 15th most populous of Washington's 39 counties, with 88,062 people (2025 estimate). Its county seat is Chehalis. The map shows its 9 cities and towns and the 8 neighboring counties.
Lewis County facts
- County seat
- Chehalis
- Population (2025 estimate)
- 88,062 +7.2% since 2020
- Land area
- 2,403 sq mi 6th largest of 39
- Water area
- 34 sq mi
- Population density
- 37 per sq mi
- Established
- 1845
- Same name
- One of 7 Lewis Counties in the US
- Named after
- Meriwether Lewis American explorer (1774-1809)
- Largest city
- Centralia 19,375
- Median household income
- $74,796
- Cities and towns
- 9 plus 4 CDPs
- ZIP codes
- 24
- Time zone
- Pacific
- FIPS code
- 53041
Cities and towns in Lewis County
Lewis County has 9 incorporated cities, towns and villages. Populations count the people living inside Lewis County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Centralia | City | 19,375 | |
| Chehalis (county seat) | City | 7,764 | |
| Winlock | City | 2,640 | |
| Napavine | City | 2,153 | |
| Morton | City | 1,102 | |
| Mossyrock | City | 806 | |
| Toledo | City | 776 | |
| Vader | City | 730 | |
| Pe Ell | Town | 669 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Fords Prairie | 1,823 | |
| Onalaska | 848 | |
| Packwood | 99 | |
| Mineral | 7 |
ZIP codes in Lewis County
24 ZIP codes reach into Lewis County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 98304 also Pierce County
- 98336
- 98355
- 98356
- 98361
- 98377
- 98531 also Thurston County
- 98532
- 98533
- 98538
- 98539
- 98542
- 98544
- 98564
- 98565
- 98568 also Grays Harbor and Thurston counties
- 98570
- 98572
- 98579 also Thurston and Grays Harbor counties
- 98582
- 98585
- 98591
- 98593
- 98596
Population of Lewis County, 2020–2025
Lewis County grew by 5,918 people (+7.2%) between April 2020 and July 2025: 849 more deaths than births and a net gain of 6,876 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 82,551 |
| 2021 | 84,576 |
| 2022 | 85,293 |
| 2023 | 86,277 |
| 2024 | 87,131 |
| 2025 | 88,062 |
Neighboring counties
- Yakima County east · 259,185 people
- Thurston County northwest · 304,261 people
- Cowlitz County southwest · 114,885 people
- Pierce County north · 946,288 people
- Skamania County southeast · 12,669 people
- Pacific County west · 24,357 people
- Grays Harbor County northwest · 78,144 people
- Wahkiakum County west · 4,873 people
Printable Lewis County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (165 KB)
- PNG (2400 px) (93 KB)
Paste this code to embed the map on your site:
Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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