ZIP Code 99320

99320 is one of Washington's ZIP codes, delivering to addresses in Benton City, Benton County.

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

Where this code sits

99320 is part of the 993xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Benton City.

Benton City Washington ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99320 delivers to without sharing its boundary.

509 Area code 509

ZIP codes nearest 99320

The ZIP codes whose reference points sit closest to 99320.
ZIP code	Distance	Delivers to
ZIP code 99353	6.2 mi	West Richland, WA
ZIP code 99354	9.3 mi	Richland, WA
ZIP code 99352	9.9 mi	Richland, WA
ZIP code 99338	14 mi	Kennewick, WA
ZIP code 99350	14 mi	Prosser, WA
ZIP code 99336	16 mi	Kennewick, WA
ZIP code 99337	18 mi	Kennewick, WA
ZIP code 99301	19 mi	Pasco, 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 99320, plotted from its record coordinates.

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

Scope ZIP code 99320. 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.