Rock Island, WA ZIP code
The ZIP code for Rock Island, Washington is 98850. It is in Douglas County.
- Population in these ZIPs
- 2,032
- Avg. median income
- $83,100population-weighted
- Typical home value
- $450,500population-weighted
- Metro area
- Wenatchee-East Wenatchee, WA
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Rock Island, WA ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 98850 | 2,032 | $83,125 | $450,500 |
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
Cities near Rock Island
Frequently asked questions
What is the ZIP code for Rock Island, WA?
The ZIP code for Rock Island, WA is 98850.
What county is Rock Island, Washington in?
Rock Island ZIP codes are in Douglas County.