ZIP Code 99338

99338 is one of Washington's ZIP codes, delivering to addresses in Kennewick, Benton County.

City: Kennewick
County: Benton County
State: Washington
Prefix: 993xx

Where this code sits

99338 is part of the 993xx range, the group of codes handled by one mail processing centre. Kennewick is served by 3 ZIP codes in total; the full list, with the county each falls in, is on the Kennewick page.

Kennewick Washington ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99338 delivers to without sharing its boundary.

509 Area code 509

ZIP codes nearest 99338

The ZIP codes whose reference points sit closest to 99338.
ZIP code	Distance	Delivers to
ZIP code 99336	6.0 mi	Kennewick, WA
ZIP code 99337	6.3 mi	Kennewick, WA
ZIP code 99352	6.7 mi	Richland, WA
ZIP code 99302	9.8 mi	Pasco, WA
ZIP code 99301	10 mi	Pasco, WA
ZIP code 99354	12 mi	Richland, WA
ZIP code 99353	12 mi	West Richland, WA
ZIP code 99320	14 mi	Benton City, 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 99338, plotted from its record coordinates.

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

Scope ZIP code 99338. 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.