ZIP codes in Walla Walla County
8 ZIPs touch Walla Walla County, Washington. The blue dashed line is the county border; orange ZIPs reach into it.
8
ZIP codes
3
cross the county line
62,319
people in these ZIPs
39
counties in WA
Most people
Walla Walla County ZIP list
More counties in Washington
- Skamania County8
- Snohomish County38
- Spokane County60
- Stevens County21
- Thurston County23
- Wahkiakum County6
- Whatcom County21
- Whitman County24
- Yakima County26
Questions people actually ask
How many ZIP codes are in Walla Walla County, Washington?
8 ZIP codes reach into Walla Walla County. 3 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in Walla Walla County has the most people?
99362 (Walla Walla) has about 42,853 residents, the most of any ZIP touching Walla Walla County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in Walla Walla County and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in Walla Walla County. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
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Updated 2026-11-10 · Where the data comes from