ZIP Code 98581

98581 is one of Washington's ZIP codes, delivering to addresses in Ryderwood, Cowlitz County.

City: Ryderwood
County: Cowlitz County
State: Washington
Prefix: 985xx

Where this code sits

98581 is part of the 985xx range, the group of codes handled by one mail processing centre. It is the only ZIP code delivering to Ryderwood.

Area codes over the same ground

Postal and telephone geography are drawn separately, so these codes cover the area 98581 delivers to without sharing its boundary.

ZIP codes nearest 98581

The ZIP codes whose reference points sit closest to 98581.
ZIP code	Distance	Delivers to
ZIP code 98593	4.3 mi	Vader, WA
ZIP code 98611	9.1 mi	Castle Rock, WA
ZIP code 98538	9.7 mi	Curtis, WA
ZIP code 98596	10 mi	Winlock, WA
ZIP code 98591	11 mi	Toledo, WA
ZIP code 98645	14 mi	Silverlake, WA
ZIP code 98565	15 mi	Napavine, WA
ZIP code 98632	16 mi	Longview, 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 98581, plotted from its record coordinates.

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

Scope ZIP code 98581. 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.