ZIP Code 99121

99121 is one of Washington's ZIP codes, delivering to addresses in Danville, Ferry County.

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

Where this code sits

99121 is part of the 991xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Danville.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99121 delivers to without sharing its boundary.

509 Area code 509

ZIP codes nearest 99121

The ZIP codes whose reference points sit closest to 99121.
ZIP code	Distance	Delivers to
ZIP code 99118	8.3 mi	Curlew, WA
ZIP code 99146	12 mi	Laurier, WA
ZIP code 99150	12 mi	Malo, WA
ZIP code 99160	15 mi	Orient, WA
ZIP code 99107	17 mi	Boyds, WA
ZIP code 99166	23 mi	Republic, WA
ZIP code 98859	23 mi	Wauconda, WA
ZIP code 99126	27 mi	Evans, 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 99121, plotted from its record coordinates.

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

Scope ZIP code 99121. 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.