Asotin County, Washington
County seat: Asotin · Population 22,545 (2025) · 636 sq mi
Asotin County is the 30th most populous of Washington's 39 counties, with 22,545 people (2025 estimate). Its county seat is Asotin. The map shows its 2 cities and towns and the 4 neighboring counties.
Asotin County facts
- County seat
- Asotin
- Population (2025 estimate)
- 22,545 +1.1% since 2020
- Land area
- 636 sq mi 34th largest of 39
- Water area
- 4 sq mi
- Population density
- 35 per sq mi
- Established
- 1883
- Largest city
- Clarkston Heights-Vineland 7,884
- Median household income
- $72,283
- Cities and towns
- 2 plus 3 CDPs
- ZIP codes
- 3
- Time zone
- Pacific
- FIPS code
- 53003
Cities and towns in Asotin County
Asotin County has 2 incorporated cities, towns and villages. Populations count the people living inside Asotin County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Clarkston | City | 7,189 | |
| Asotin (county seat) | City | 1,187 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Clarkston Heights-Vineland | 7,884 | |
| West Clarkston-Highland | 5,444 | |
| Anatone | 0 |
ZIP codes in Asotin County
3 ZIP codes reach into Asotin County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 99401
- 99402
- 99403 also Garfield County
Population of Asotin County, 2020–2025
Asotin County grew by 253 people (+1.1%) between April 2020 and July 2025: 349 more deaths than births and a net gain of 606 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 22,327 |
| 2021 | 22,473 |
| 2022 | 22,489 |
| 2023 | 22,492 |
| 2024 | 22,538 |
| 2025 | 22,545 |
Neighboring counties
- Garfield County northwest · 2,416 people
- Nez Perce County, Idaho northeast · 42,905 people
- Wallowa County, Oregon south · 7,595 people
- Whitman County north · 48,512 people
Printable Asotin 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) (105 KB)
- PNG (2400 px) (81 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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