ZIP Code 99140

99140 is one of Washington's ZIP codes, delivering to addresses in Keller, Ferry County.

City: Keller
County: Ferry County
State: Washington
Prefix: 991xx

Where this code sits

99140 is part of the 991xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Keller.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99140 delivers to without sharing its boundary.

509 Area code 509

ZIP codes nearest 99140

The ZIP codes whose reference points sit closest to 99140.
ZIP code	Distance	Delivers to
ZIP code 99116	13 mi	Coulee Dam, WA
ZIP code 99124	14 mi	Elmer City, WA
ZIP code 99147	16 mi	Lincoln, WA
ZIP code 99117	17 mi	Creston, WA
ZIP code 99133	17 mi	Grand Coulee, WA
ZIP code 99155	18 mi	Nespelem, WA
ZIP code 99123	20 mi	Electric City, WA
ZIP code 99185	20 mi	Wilbur, 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 99140, plotted from its record coordinates.

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

Scope ZIP code 99140. 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.