ZIP Code 99003

99003 is one of Washington's ZIP codes, delivering to addresses in Chattaroy, Spokane County.

City: Chattaroy
County: Spokane County
State: Washington
Prefix: 990xx

Where this code sits

99003 is part of the 990xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Chattaroy.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99003 delivers to without sharing its boundary.

509 Area code 509

ZIP codes nearest 99003

The ZIP codes whose reference points sit closest to 99003.
ZIP code	Distance	Delivers to
ZIP code 99005	6.6 mi	Colbert, WA
ZIP code 99009	7.0 mi	Elk, WA
ZIP code 99021	8.7 mi	Mead, WA
ZIP code 99006	8.9 mi	Deer Park, WA
ZIP code 99217	13 mi	Spokane, WA
ZIP code 99218	13 mi	Spokane, WA
ZIP code 99110	14 mi	Clayton, WA
ZIP code 99208	14 mi	Spokane, 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 99003, plotted from its record coordinates.

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

Scope ZIP code 99003. 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.