ZIP CodesZIP codes in Cowlitz County, Washington
Cowlitz County, Washington has 11 ZIP codes in this list, from 98581 to 98674. They cover 11 places, among them Ryderwood, Ariel, Carrolls and Castle Rock.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 98581 | Ryderwood | 29.2 | 46.375, -123.043 |
| 98603 | Ariel | 115 | 45.995, -122.468 |
| 98609 | Carrolls | 0.1 | 46.072, -122.865 |
| 98611 | Castle Rock | 136 | 46.278, -122.914 |
| 98616 | Cougar | 113 | 46.051, -122.299 |
| 98625 | Kalama | 194 | 46.011, -122.817 |
| 98626 | Kelso | 135 | 46.148, -122.887 |
| 98632 | Longview | 121 | 46.151, -122.963 |
| 98645 | Silverlake | 15.2 | 46.316, -122.765 |
| 98649 | Toutle | 196 | 46.296, -122.648 |
| 98674 | Woodland | 86.5 | 45.922, -122.713 |
The ZIP code areas of Cowlitz County add up to about 1,142 square miles of land (2,957 sq km) as the Census Bureau draws them. The largest is 98649 (Toutle), with 196 square miles.
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Ryderwood, WA 98581.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.