ZIP Code 99363

99363 is one of Washington's ZIP codes, delivering to addresses in Wallula, Walla Walla County.

City: Wallula
County: Walla Walla County
State: Washington
Prefix: 993xx

Where this code sits

99363 is part of the 993xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Wallula.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99363 delivers to without sharing its boundary.

509 Area code 509

ZIP codes nearest 99363

The ZIP codes whose reference points sit closest to 99363.
ZIP code	Distance	Delivers to
ZIP code 99323	7.7 mi	Burbank, WA
ZIP code 99360	12 mi	Touchet, WA
ZIP code 99337	13 mi	Kennewick, WA
ZIP code 99302	14 mi	Pasco, WA
ZIP code 99301	15 mi	Pasco, WA
ZIP code 99336	15 mi	Kennewick, WA
ZIP code 97835	18 mi	Helix, OR
ZIP code 99338	18 mi	Kennewick, WA

Straight-line distance between place reference points, not driving distance. Where a place has no Census Gazetteer point, its postal centroid is used instead.

Each point is the reference point for 99363, plotted from its record coordinates.

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

Scope ZIP code 99363. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated 15 July 2026. A ZIP code is a set of delivery routes, not an area; the point shown is a record coordinate, not a centre.