Town guide · Castle Rock

Get to know Castle Rock

The practical stuff — trash day, town hall, schools — plus the town’s story and where to go. Kept current by neighbors.

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The essentials

The basics

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Collection days
Trash day
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Schools & library
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Good to know
ZIP code Wikidata
98611
Area code Wikidata
360

About Castle Rock

City in Washington, United States
2,446Population
2.1 sq miArea
59 ftElevation

Castle Rock is a city in Cowlitz County, Washington, United States. Located between the Willapa Hills and the western base of Mount St. Helens, Castle Rock is at the heart of Washington timber country in the Pacific temperate rain forest. Castle Rock is part of the Longview, Washington Metropolitan Statistical Area; the population was 2,446 as of the 2020 census.

Official town website ↗

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

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Town essentials

Official information, kept current with help from neighbors.

Office address

ANNOUNCEMENT: City Fire and Ambulance Services Now Provided by Cowlitz Fire Protection District #6

146 A Street SW Mailing Address: PO Box 205 Castle Rock, WA 98611 Business Phone: (360) 274-4413 In An Emergency Dial 9-1-1

Official source ↗Checked Sep 18, 2026
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Castle Rock

Washington · WA
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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/18 · 2025-01-01