Rock Island, WA ZIP Codes
One ZIP code serves Rock Island, Washington: 98850. Together they are home to 2,032 residents in 684 households. That is more than the 1,251 people counted inside Rock Island city limits, because these ZIP codes reach past its boundary.
Rock Island city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 1,251 |
| Households | 443 |
| Median household income | $69,861 |
| Median home value | $273,500 |
| Median age | 37.8 |
| Median rent | $1,143 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 2,032 |
| Households (sum of ZIP codes) | 684 |
| Median household income, range across ZIP codes | $83,125 (98850) to $83,125 (98850) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $83,125 |
| Homeowners | 82.0% |
| Households with kids under 18 | 50.1% |
| Moved in the past year | 4.0% |
| Carrier routes in EDDM2GO's route library | 2 routes, 605 homes (1 of 1 ZIP codes) |
Every ZIP code in Rock Island
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 98850 | Rock Island | 2,032 | 684 | $83,125 | $374,700 | 82.0% | 50.1% | 4.0% | 2 | 617 | 1% of its land; mailing city |
A ZIP code is listed for Rock Island when at least 10% of its land lies inside Rock Island city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Rock Island. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Rock Island.
Counties
- Douglas County — 11 ZIP codes
Price a mailing to Rock Island ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Rock Island, WA?
- 98850. A ZIP code is listed for Rock Island when at least 10% of its land lies inside Rock Island city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Rock Island.
- What is the population of Rock Island, WA?
- The Census Bureau counts 1,251 residents inside Rock Island city limits (ACS 2020–2024). The 1 ZIP code that serve Rock Island hold 2,032 residents in all.
- What is the median household income in Rock Island, WA?
- $69,861 inside Rock Island city limits, per the Census Bureau. Across its ZIP codes the medians run from $83,125 to $83,125.
- How many carrier routes and mailboxes are in Rock Island, WA?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 2 carrier routes reaching 605 residential and 12 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.