Cowlitz County, Washington ZIP Codes
- ZIP records
10 - Cities represented
10 - Sum of listed ZIP population estimates
116,840
Population sum includes positive estimates in these ZIP records; it is not an official county population.
Top ZIP Codes by Population
| Rank | ZIP Code | City | Population estimate |
|---|---|---|---|
| 1 | 98632 | Longview | 50,635 |
| 2 | 98626 | Kelso | 26,892 |
| 3 | 98674 | Woodland | 17,525 |
| 4 | 98611 | Castle Rock | 9,302 |
| 5 | 98625 | Kalama | 7,655 |
| 6 | 98645 | Silverlake | 2,216 |
| 7 | 98603 | Ariel | 1,267 |
| 8 | 98649 | Toutle | 929 |
| 9 | 98581 | Ryderwood | 419 |
Cities in Cowlitz County
ZIP Directory
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Methodology: Records are grouped by the source file's listed county and state. Population sums add positive ZIP-level estimates and are not official county totals; city counts use distinct city labels in the source.