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West county atlas

Washington county map

Explore all 39 counties. Select a county to see its map, or download a copy for your next project.

2025 Census boundaries39 mapped unitsCapital: Olympia
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Boundary map 100%
Labelled map of Washington counties Adams CountyAsotin CountyBenton CountyChelan CountyClallam CountyClark CountyColumbia CountyCowlitz CountyDouglas CountyFerry CountyFranklin CountyGarfield CountyGrant CountyGrays Harbor CountyIsland CountyJefferson CountyKing CountyKitsap CountyKittitas CountyKlickitat CountyLewis CountyLincoln CountyMason CountyOkanogan CountyPacific CountyPend Oreille CountyPierce CountySan Juan CountySkagit CountySkamania CountySnohomish CountySpokane CountyStevens CountyThurston CountyWahkiakum CountyWalla Walla CountyWhatcom CountyWhitman CountyYakima County
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2025 U.S. Census boundaries. Zoom to reveal more names. Drag to pan when zoomed; use arrow keys, + and − with the map focused.

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SVG

SVG is editable vector artwork. PNG is a high-resolution image. PDF uses landscape Letter pages, with a separate key when needed.

Downloads contain the complete boundary map, independent of zoom. Crowded names use a numbered key. Numbered quiz maps use the county list / answer key (CSV). Boundary data (GeoJSON) · Reuse with source credit.

Roads, terrain & aerial imagery

Explore Washington with a county boundary overlay. Choose a view to load the interactive map.

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Street names, terrain, or aerial photography with the county boundary in view.

Backgrounds load from OpenStreetMap or USGS only when selected. Imagery dates and detail vary by location.

Map scope: Use the boundary map for names and shapes, or the interactive background viewer for roads, terrain, and aerial imagery. County boundaries do not identify parcels or ZIP codes.

Washington county geography overview

Washington has 39 counties, which places it 33rd among the 50 state and District of Columbia maps in this atlas when ordered by number of county-level units. Their combined 66,456.4 square miles of land place the state 20th by mapped land area.

The average county-level area is 1,704 square miles, while the median is 1,738.8 square miles. The median is often the better description of a typical unit because one or two very large areas can pull the average upward. The five largest units together account for about 27% of the state’s mapped land area.

39county-level units
1,738.8 sq mimedian land area
5,266.2 sq milargest unit
7%share of mapped area that is water

Largest and smallest Washington counties

Okanogan County is the largest county-level unit by land area at 5,266.2 square miles. It represents about 8% of all mapped land in Washington. At the other end of the range, San Juan County has 173.9 square miles of land.

Largest by land area

  1. Okanogan County5,266.2 sq mi
  2. Yakima County4,294.5 sq mi
  3. Chelan County2,921.2 sq mi
  4. Grant County2,679.6 sq mi
  5. Stevens County2,477.1 sq mi

Smallest by land area

  1. San Juan County173.9 sq mi
  2. Island County208.7 sq mi
  3. Wahkiakum County262.9 sq mi
  4. Kitsap County395.1 sq mi
  5. Clark County628.5 sq mi

Rankings use land area rather than total area. This avoids making coastal or lake counties appear larger solely because their boundaries include extensive water.

Alphabetical list of Washington counties

The table is alphabetical, so it works as a name and FIPS-code reference rather than an area ranking. Every identifier begins with the Washington state FIPS prefix 53. Land and water figures are rounded to one decimal place.

39 county-level areas

Download county data / numbered map key (CSV)
No.NameFIPS codeLand areaWater area
1Adams County530011,925 sq mi4.8 sq mi
2Asotin County53003636.1 sq mi4.4 sq mi
3Benton County530051,700.1 sq mi59.6 sq mi
4Chelan County530072,921.2 sq mi73.2 sq mi
5Clallam County530091,738.8 sq mi930.2 sq mi
6Clark County53011628.5 sq mi27.1 sq mi
7Columbia County53013868.6 sq mi4.9 sq mi
8Cowlitz County530151,141.2 sq mi25.2 sq mi
9Douglas County530171,819.2 sq mi29.6 sq mi
10Ferry County530192,203.2 sq mi54.2 sq mi
11Franklin County530211,241.6 sq mi23.4 sq mi
12Garfield County53023710.8 sq mi7.4 sq mi
13Grant County530252,679.6 sq mi111.9 sq mi
14Grays Harbor County530271,902.3 sq mi321.3 sq mi
15Island County53029208.7 sq mi308.6 sq mi
16Jefferson County530311,803.7 sq mi384.2 sq mi
17King County530332,115.7 sq mi191.7 sq mi
18Kitsap County53035395.1 sq mi170.7 sq mi
19Kittitas County530372,297.3 sq mi35.7 sq mi
20Klickitat County530391,871.6 sq mi32.8 sq mi
21Lewis County530412,402.8 sq mi33.6 sq mi
22Lincoln County530432,310.6 sq mi29.1 sq mi
23Mason County53045959.6 sq mi91.5 sq mi
24Okanogan County530475,266.2 sq mi46.5 sq mi
25Pacific County53049933.4 sq mi293.2 sq mi
26Pend Oreille County530511,400.2 sq mi25.3 sq mi
27Pierce County530531,668 sq mi137.5 sq mi
28San Juan County53055173.9 sq mi446.9 sq mi
29Skagit County530571,730.2 sq mi186.8 sq mi
30Skamania County530591,658.3 sq mi28.3 sq mi
31Snohomish County530612,086.5 sq mi109.2 sq mi
32Spokane County530631,764.2 sq mi16.8 sq mi
33Stevens County530652,477.1 sq mi62.9 sq mi
34Thurston County53067722.5 sq mi51.6 sq mi
35Wahkiakum County53069262.9 sq mi23.8 sq mi
36Walla Walla County530711,270 sq mi28.9 sq mi
37Whatcom County530732,107.9 sq mi396.9 sq mi
38Whitman County530752,159.3 sq mi18.6 sq mi
39Yakima County530774,294.5 sq mi15.9 sq mi

How to read and use this map

County lines are administrative boundaries, not postal routes. A mailing address can use a city name associated with a neighboring area, and ZIP codes can cross county lines. When you need to identify a county for an address, confirm it with an official geocoder or local government source.

For classroom or planning use, download a PDF from the controls above. Labelled exports use numbered callouts for crowded areas; numbered quiz maps match the alphabetical county list. SVG files keep the boundary lines sharp at larger paper sizes.

Frequently asked questions

How many counties are in Washington?

Washington has 39 counties in the U.S. Census Bureau’s 2025 cartographic boundary file.

Can I print this Washington county map?

Yes. Choose Download / print and select PDF for a landscape Letter page, PNG for an image, or SVG for editable vector artwork. Because the map is SVG, its boundary lines stay sharp when scaled.

What is the largest county in Washington?

Okanogan County is the largest by land area in this dataset at 5,266.2 square miles. This is an area ranking, not a population ranking.

What is the smallest county in Washington?

San Juan County is the smallest by land area in this dataset at 173.9 square miles.

Are these legal survey boundaries?

No. This is a generalized reference map. Property, parcel, election, and legal boundary questions should be checked with the relevant state or local agency.

Map source

U.S. Census Bureau, 2025 Cartographic Boundary File, Counties, 1:5,000,000. Land and water area fields are supplied in the same file and converted from square meters to square miles. Accessed September 27, 2026.