Castle Rock, WA ZIP Codes
One ZIP code serves Castle Rock, Washington: 98611. Together they are home to 9,302 residents in 3,539 households. That is more than the 2,217 people counted inside Castle Rock city limits, because these ZIP codes reach past its boundary.
Castle Rock city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 2,217 |
| Households | 871 |
| Median household income | $69,639 |
| Median home value | $348,600 |
| Median age | 33.9 |
| Median rent | $1,222 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 9,302 |
| Households (sum of ZIP codes) | 3,539 |
| Median household income, range across ZIP codes | $86,322 (98611) to $86,322 (98611) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $86,322 |
| Homeowners | 83.8% |
| Households with kids under 18 | 27.5% |
| Moved in the past year | 7.8% |
| Carrier routes in EDDM2GO's route library | 8 routes, 3,918 homes (1 of 1 ZIP codes) |
Every ZIP code in Castle Rock
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 98611 | Castle Rock | 9,302 | 3,539 | $86,322 | $425,700 | 83.8% | 27.5% | 7.8% | 8 | 3,969 | 2% of its land; mailing city |
A ZIP code is listed for Castle Rock when at least 10% of its land lies inside Castle Rock city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Castle Rock. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Castle Rock.
Counties
- Cowlitz County — 10 ZIP codes
Price a mailing to Castle Rock ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Castle Rock, WA?
- 98611. A ZIP code is listed for Castle Rock when at least 10% of its land lies inside Castle Rock city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Castle Rock.
- What is the population of Castle Rock, WA?
- The Census Bureau counts 2,217 residents inside Castle Rock city limits (ACS 2020–2024). The 1 ZIP code that serve Castle Rock hold 9,302 residents in all.
- What is the median household income in Castle Rock, WA?
- $69,639 inside Castle Rock city limits, per the Census Bureau. Across its ZIP codes the medians run from $86,322 to $86,322.
- How many carrier routes and mailboxes are in Castle Rock, WA?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 8 carrier routes reaching 3,918 residential and 51 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.