ZIP code · Castle Rock · Washington · United States
ZIP code 98611 — Castle Rock
ZIP code 98611 serves Castle Rock, Washington.
- Postal code
- 98611Single source Value from one source, not cross-checked.
- City
- Castle Rock
- County
- Cowlitz FIPS 53015
- State
- Washington
- Country
- United States
- Coordinates
- 46.2783, -122.9139 — precision precise (locality)
View on OpenStreetMap - Population
- 9,367 (ZCTA, ACS 5-year)
- Population density
- 69 / sq mi
- Land area
- 136.1 sq mi (352.6 km²) (ZCTA, ACS 5-year)
- Median household income
- $81,630
- Per-capita income
- $36,560
- Median age
- 44.1
- Households
- 3,476
- Housing units
- 3,687
- Median home value
- $382,000
- Median gross rent
- $1,348 / month
- Congressional district
- WA-3 (119th Congress)
- USDA hardiness zone
- 8b (15 to 20 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Los_Angeles (UTC−8 / UTC−7 DST)
Tools: compare 98611 with another ZIP · ZIPs within 25 miles · distance from 98611
Map of ZIP code 98611
Climate — monthly normals
Warmest month Aug (avg high 80°F), coldest Feb (avg low 35°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 48 | 52 | 57 | 62 | 69 | 73 | 79 | 80 | 76 | 64 | 53 | 47 |
| Avg low °F | 35 | 35 | 38 | 40 | 45 | 50 | 53 | 53 | 50 | 44 | 39 | 35 |
| Precip in | 6.5 | 4.8 | 4.9 | 4.1 | 3.1 | 2.0 | 0.6 | 1.0 | 2.3 | 4.4 | 7.2 | 7.1 |
NOAA 1991–2020 climate normals from the nearest station: LONGVIEW (8.8 mi) · NOAA NCEI
Places in ZIP 98611
- 3 schools
- 1 hospitals & clinics
- 2 doctors & dentists
- 1 pharmacies
- 1 supermarkets
- 15 restaurants & cafés
- 3 bars & pubs
- 11 parks
- 8 playgrounds
- 2 gyms & sports centres
- 1 libraries
- 1 post offices
- 10 places of worship
- 2 banks
- 9 gas stations
- 1 EV charging stations
- 2 police & fire stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page