ZIP Code 99171

99171 is one of Washington's ZIP codes, delivering to addresses in Saint John, Whitman County.

City: Saint John
County: Whitman County
State: Washington
Prefix: 991xx

Where this code sits

99171 is part of the 991xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Saint John.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99171 delivers to without sharing its boundary.

509 Area code 509

ZIP codes nearest 99171

The ZIP codes whose reference points sit closest to 99171.
ZIP code	Distance	Delivers to
ZIP code 99176	9.4 mi	Thornton, WA
ZIP code 99174	11 mi	Steptoe, WA
ZIP code 99149	12 mi	Malden, WA
ZIP code 99125	12 mi	Endicott, WA
ZIP code 99170	13 mi	Rosalia, WA
ZIP code 99158	16 mi	Oakesdale, WA
ZIP code 99017	16 mi	Lamont, WA
ZIP code 99111	17 mi	Colfax, 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 99171, plotted from its record coordinates.

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

Scope ZIP code 99171. 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.