- Adams
- Asotin
- Benton
- Chelan
- Clallam
- Clark
- Columbia
- Cowlitz
- Douglas
- Ferry
- Franklin
- Garfield
- Grant
- Grays Harbor
- Island
- Jefferson
- King
- Kitsap
- Kittitas
- Klickitat
- Lewis
- Lincoln
- Mason
- Okanogan
- Pacific
- Pend Oreille
- Pierce
- San Juan
- Skagit
- Skamania
- Snohomish
- Spokane
- Stevens
- Thurston
- Wahkiakum
- Walla Walla
- Whatcom
- Whitman
- Yakima
Counties by State
All the counties in Washington (WA)
Click on one of the county names below, or use the search box to find the zip code information you need.
US Zip Code Information: