ZIP code 98611: Castle Rock, WA
98611 is a ZIP code in Castle Rock, Washington, mainly in Cowlitz County, part of the Longview-Kelso, WA metro area. About 9,302 people live here.
- Population
- 9,302
- Median household income
- $86,322
- Typical home value
- $475,900+1.1% in 12 months
- Median rent
- $1,250gross, per month
- Median age
- 43.7
- Homeowners
- 83.8%of occupied homes
Shaded: ZIP code 98611's area. Click anywhere on the map to see which ZIP code it's in.
ZIP codes within 10 milesWithin 25 miles
ZIP code 98611 details
| City | Castle Rock |
|---|---|
| State | Washington |
| County | Cowlitz County |
| Metro area | Longview-Kelso, WA |
| Time zone | Pacific Time (UTC−8), observes daylight saving time |
| Type | Standard (delivery area) |
| Land area | 136.1 sq mi, plus 1.5 sq mi of water |
| Population density | 68 people per sq mi |
| Bachelor's degree or higher | 14.9% of adults 25+ |
| Average commute | 29.2 minutes |
| Center coordinates | 46.30515, -122.90069 |
Median rent in 98611 by bedrooms
| Size | Median gross rent |
|---|---|
| 1 bedroom | $981/mo |
| 2 bedrooms | $1,206/mo |
| 3 bedrooms | $1,419/mo |
Gross rent includes utilities paid by the tenant. ACS 2020–2024; sizes with too few rentals to estimate are left out.
ZIP codes near 98611
| ZIP code | City | Distance | Population |
|---|---|---|---|
| 98645 | Silverlake, WA | 7.0 mi | 2,216 |
| 98593 | Vader, WA | 8.5 mi | 1,541 |
| 98581 | Ryderwood, WA | 8.8 mi | 419 |
| 98632 | Longview, WA | 10.4 mi | 50,635 |
| 98626 | Kelso, WA | 11.0 mi | 26,892 |
| 98591 | Toledo, WA | 12.0 mi | 3,965 |
| 98596 | Winlock, WA | 13.2 mi | 6,950 |
| 98609 | Carrolls, WA | 16.2 mi | 0 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Buying a home in 98611?
A typical home in ZIP code 98611 is worth about $475,900 (Zillow Home Value Index). The median household here earns $86,322 a year. See what buying here would cost per month, with Washington average taxes and insurance filled in.
Monthly payment for a $475,900 homeWhat can a $86,322 income afford?Rental property numbers
About ZIP code 98611
What city is ZIP code 98611?
ZIP code 98611 is in Castle Rock, WA, in Cowlitz County.
What county is ZIP code 98611 in?
98611 is mainly in Cowlitz County, Washington.
What is the population of ZIP code 98611?
About 9,302 people live in ZIP code 98611, according to the American Community Survey 2020–2024 5-year estimates.
What time zone is ZIP code 98611 in?
98611 is in Pacific Time (UTC−8). It observes daylight saving time.