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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2023

ZIP Codes for City of Castle Rock, WA

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Counties:COWLITZ, WA
Area Code(s):360, 564
Timezone(s):Pacific (GMT -08:00)
City Population:1,982 (More Details)
CBSA:Longview, WA
Congressional District(s):03
Land Area:1,140 square miles (county)
Water Area:26 square miles (county)

1 ZIP Code

Castle Rock, WA ZIP Code Boundaries

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Castle Rock, WA Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases

Castle Rock, WA Demographic Information *

Total population**1,982
Male population941
Female population1,041
Median age (years)39.3
White Population1,812
Black Population2
Indian Population44
Asian Population4
Hawaiian Population8
Hispanic Population97
Median age (Male)37.3
Median age (Female)40.5
Total households784
Family households (families)519
Average household size2.53
Average family size3.06
Total housing units863
* Demographic data is based on 2010 Census for the City of CASTLE ROCK.
** City and ZIP Code Population will not be equal due to differences in their geographies.


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],