ZIP Code 99023

99023 is one of Washington's ZIP codes, delivering to addresses in Mica, Spokane County.

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

Where this code sits

99023 is part of the 990xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Mica.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99023 delivers to without sharing its boundary.

509 Area code 509

ZIP codes nearest 99023

The ZIP codes whose reference points sit closest to 99023.
ZIP code	Distance	Delivers to
ZIP code 99036	5.2 mi	Valleyford, WA
ZIP code 99037	6.3 mi	Veradale, WA
ZIP code 99030	7.1 mi	Rockford, WA
ZIP code 99016	7.2 mi	Greenacres, WA
ZIP code 99019	7.7 mi	Liberty Lake, WA
ZIP code 99206	7.9 mi	Spokane, WA
ZIP code 99216	8.0 mi	Spokane, WA
ZIP code 99213	9.0 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 99023, plotted from its record coordinates.

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

Scope ZIP code 99023. 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.