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Castle Rock, WA Demographics & ZIP Codes
Castle Rock, Washington demographics and median household income by ZIP code (in Cowlitz County) — 1 ZIP codes — population 9,367 — median income $81,630 — avg. home value $382,000. Compare income, housing, and population across ZIP codes on US5.
Population
9,367
Median household income (avg.)
$81,630
109% of U.S. median
Average home value
$382,000
110% of U.S. median
Average rent
$1,055
91% of U.S. median
Median age (avg.)
44.1
Castle Rock demographics
Castle Rock, Washington covers 1 ZIP code primarily in Cowlitz County, with a combined ZIP-area population of about 9,367.
Across ZIP codes with age data, the average median age is about 44.1 years.
Median household income in Castle Rock
The average median household income across ZIP codes in Castle Rock, Washington is about $81,630 — about 6% below the WA ZIP average ($87,083), and about 9% above the U.S. median ($75,149).
The highest median household income among listed ZIPs is about $81,630 in 98611.
Housing in Castle Rock
For housing in Castle Rock, Washington, the average median home value is about $382,000 and the average median rent is about $1,055.
The most populous ZIP in this set is 98611 (about 9,367 residents). Use the table below to compare population, income, and home values across codes.
ZIP codes in Castle Rock
Sort by population, income, or home value. Click a column header to toggle ascending / descending.
| ZIP | City | County | State | Population ↓ | Income | Home value |
|---|---|---|---|---|---|---|
| 98611 | Castle Rock | Cowlitz County | WA | 9,367 | $81,630 | $382,000 |
Frequently asked questions
What are the demographics of Castle Rock?
Castle Rock, Washington has a combined ZIP-area population of about 9,367 across 1 ZIP codes (primarily Cowlitz County). Browse the ZIP table below for population, income, and housing by code.
What is the median household income in Castle Rock?
The average median household income across ZIP codes in Castle Rock, Washington is about $81,630, about 6% below the state ZIP average ($87,083), and about 9% above the U.S. median ($75,149). Average median home value is about $382,000.
How many ZIP codes are in Castle Rock?
Castle Rock, Washington includes 1 ZIP codes on US5. Each row links to demographics, median income, and housing for that code.
Where can I find ZIP code demographics for Castle Rock?
This page lists ZIP codes in Castle Rock, Washington with population, median household income, and home value. Select a ZIP for a full demographics profile.