Mercer Island, WA ZIP Codes
One ZIP code serves Mercer Island, Washington: 98040. Together they are home to 25,307 residents in 10,068 households.
Mercer Island city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 25,307 |
| Households | 10,068 |
| Median household income | $219,069 |
| Median home value | $2,000,001 |
| Median age | 46.4 |
| Median rent | $2,502 |
All 1 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 25,307 |
| Households (sum of ZIP codes) | 10,068 |
| Median household income, range across ZIP codes | $219,069 (98040) to $219,069 (98040) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $219,069 |
| Homeowners | 67.0% |
| Households with kids under 18 | 32.0% |
| Moved in the past year | 13.2% |
| Carrier routes in EDDM2GO's route library | 20 routes, 10,365 homes (1 of 1 ZIP codes) |
Every ZIP code in Mercer Island
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 98040 | Mercer Island | 25,307 | 10,068 | $219,069 | $2,000,000+ | 67.0% | 32.0% | 13.2% | 20 | 10,815 | 100% of its land; mailing city |
A ZIP code is listed for Mercer Island when at least 10% of its land lies inside Mercer Island city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Mercer Island. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Mercer Island.
Counties
- King County — 88 ZIP codes
Price a mailing to Mercer Island ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Mercer Island, WA?
- 98040. A ZIP code is listed for Mercer Island when at least 10% of its land lies inside Mercer Island city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Mercer Island.
- What is the population of Mercer Island, WA?
- The Census Bureau counts 25,307 residents inside Mercer Island city limits (ACS 2020–2024). The 1 ZIP code that serve Mercer Island hold 25,307 residents in all.
- What is the median household income in Mercer Island, WA?
- $219,069 inside Mercer Island city limits, per the Census Bureau. Across its ZIP codes the medians run from $219,069 to $219,069.
- How many carrier routes and mailboxes are in Mercer Island, WA?
- For the 1 of 1 ZIP codes in EDDM2GO's stored route library: 20 carrier routes reaching 10,365 residential and 442 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.