Walla Walla County ZIP Codes

Walla Walla County is a county of Washington.

ZIP codes: 8
Cities & towns: 8
Area codes: 1
Land area: 1,270 sq mi

Every ZIP code in Walla Walla County

993xx

The complete list of Walla Walla County, WA ZIP codes with the city each one delivers to.
ZIP code	City
99323	Burbank
99324	College Place
99329	Dixie
99348	Prescott
99360	Touchet
99361	Waitsburg
99362	Walla Walla
99363	Wallula

We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Walla Walla County codes above are listed without a column we would have to invent.

Cities and towns in Walla Walla County

A further 4 places in Walla Walla County appear in the postal source without a page of its own; their codes are in the table above and each one links to its own page.

Area codes covering Walla Walla County

Telephone and postal boundaries are drawn by different bodies, so these codes overlap the county without matching its edges.

509 Area code 509

Where Walla Walla County's ZIP codes sit

Each point is the reference point of one Walla Walla County ZIP code, plotted from its record coordinates. The outline is the convex envelope of those points — a footprint, not a boundary.

Reference points and footprint
Not an official NANPA boundary
Not a USPS delivery area

Scope every ZIP code recorded in Walla Walla County. Source GeoNames US postal codes (2026-07 postal dump), Census 2024 county Gazetteer (2024 Gazetteer) and geoinfo-dataset (full_dataset) ZIP→NPA (2018 snapshot). Updated 16 July 2026. The outline is a convex envelope of ZIP reference points, not a jurisdiction boundary.