ZIP Code 98611: Castle Rock, WA
County: Cowlitz
Coordinates: 46.27830, -122.91390
ZIP Type: Standard
Time Zone: Pacific Time (PT)
Explore detailed information for ZIP code 98611 in Castle Rock, WA. We include verified county details for Cowlitz plus key geographic references used for mapping and logistics.
| Primary City | Castle Rock |
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| ZIP Code | 98611 |
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| County | Cowlitz |
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| State | WA |
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| Latitude / Longitude | 46.27830, -122.91390 |
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| ZIP Type | Standard |
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| Time Zone | Pacific Time (PT) |
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| Data Updated | 2026-01-08 |
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Maps & Useful Links
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These links show the approximate center point for ZIP 98611 (not an exact boundary).
Geographic & Administrative Context
The geographic center of ZIP code 98611 is approximately 46.27830 (latitude) and -122.91390 (longitude). This location sits within Cowlitz, contributing to regional planning across WA.
Local Coverage Notes
ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 98611 for mail delivery and general location reference in
Cowlitz,
WA.
Some addresses near Castle Rock may share this ZIP due to delivery routing and local service areas.
Related ZIP Codes (Nearby)
Explore other postal codes near Castle Rock within WA.
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Frequently Asked Questions
What is the primary city for ZIP code 98611?
The primary city for this ZIP code is Castle Rock, located in WA.
In which county is 98611 located?
ZIP code 98611 is situated within Cowlitz, WA.
What are the coordinates for 98611?
The approximate center point is 46.27830 (Latitude) and -122.91390 (Longitude).
Is ZIP code 98611 active?
This page lists ZIP 98611 as Listed based on the latest refresh date shown above.
Does ZIP 98611 cover multiple areas?
Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.
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Methodology & Data Notes
How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.
Page updated: 2026-01-08