List of ZIP Codes in Cowlitz County
The following table lists ZIP Codes associated with Cowlitz County, Washington, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.
| S.N. | Zip Code | Latitude | Longitude | City | Population | Density |
|---|---|---|---|---|---|---|
| 1 | 98581 | 46.35875 | -123.06865 | Ryderwood | 383 | 5.1 |
| 2 | 98603 | 46.04223 | -122.42001 | Ariel | 1,192 | 4.0 |
| 3 | 98609 | 46.0717 | -122.86569 | Carrolls | 0 | 0.0 |
| 4 | 98611 | 46.30642 | -122.90479 | Castle Rock | 9,367 | 26.6 |
| 5 | 98625 | 46.10871 | -122.56093 | Kalama | 7,020 | 14.0 |
| 6 | 98626 | 46.15317 | -122.78564 | Kelso | 26,948 | 77.3 |
| 7 | 98632 | 46.21223 | -123.06855 | Longview | 50,845 | 161.7 |
| 8 | 98645 | 46.32509 | -122.77993 | Silverlake | 2,195 | 55.8 |
| 9 | 98649 | 46.31504 | -122.53415 | Toutle | 980 | 1.9 |
| 10 | 98674 | 45.94672 | -122.65568 | Woodland | 16,765 | 74.8 |
About Cowlitz County ZIP Codes
Cowlitz County in Washington (WA) is served by approximately 10 ZIP Codes. These codes cover residential neighborhoods, business districts, and rural areas that fall under the county's jurisdiction.
Based on ZIP-level population estimates, the total population covered by these ZIP Codes is around 115,695 people. Population and density values vary from one ZIP Code to another, reflecting the mix of dense urban communities and lower-density suburban or rural zones.
Many of the most significant population centers in Cowlitz County are located in cities such as Longview, Kelso, Woodland, Castle Rock, Kalama. These cities and towns help define the economic and demographic character of the county.
Most ZIP Codes in Cowlitz County, Washington follow the America/Los_Angeles time zone.
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