ZIP Code 99113

99113 is one of Washington's ZIP codes, delivering to addresses in Colton, Whitman County.

City: Colton
County: Whitman County
State: Washington
Prefix: 991xx

Where this code sits

99113 is part of the 991xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Colton.

Colton Washington ZIP codes →

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 99113 delivers to without sharing its boundary.

509 Area code 509

ZIP codes nearest 99113

The ZIP codes whose reference points sit closest to 99113.
ZIP code	Distance	Delivers to
ZIP code 99179	5.8 mi	Uniontown, WA
ZIP code 99164	9.8 mi	Pullman, WA
ZIP code 99163	10 mi	Pullman, WA
ZIP code 83832	12 mi	Genesee, ID
ZIP code 83844	13 mi	Moscow, ID
ZIP code 83843	13 mi	Moscow, ID
ZIP code 99403	14 mi	Clarkston, WA
ZIP code 99102	15 mi	Albion, 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 99113, plotted from its record coordinates.

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

Scope ZIP code 99113. 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.