Cowlitz County ZIP Codes
Washington, United States · 11 codes
Cowlitz County in Washington has 11 ZIP codes, from 98581 to 98674, serving 11 places.
ZIP codes in Cowlitz
Frequently asked questions
What is the ZIP code of Cowlitz?
Cowlitz has 11 ZIP codes, from 98581 to 98674. The table lists the places each one serves.
How many places are listed in Cowlitz County?
11 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.