ZIP Code 98040: Mercer Island, WA
County: King County
Coordinates: 47.56030, -122.22810
ZIP Type: Standard
Time Zone: Pacific Time (PT)
Explore detailed information for ZIP code 98040 in Mercer Island, WA. We include verified county details for King County plus key geographic references used for mapping and logistics.
| Primary City | Mercer Island |
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| ZIP Code | 98040 |
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| County | King County |
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| State | WA |
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| Latitude / Longitude | 47.56030, -122.22810 |
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| ZIP Type | Standard |
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| Time Zone | Pacific Time (PT) |
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| Data Updated | 2026-01-08 |
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Maps & Useful Links
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These links show the approximate center point for ZIP 98040 (not an exact boundary).
Geographic & Administrative Context
The geographic center of ZIP code 98040 is approximately 47.56030 (latitude) and -122.22810 (longitude). This location sits within King County, contributing to regional planning across WA.
Local Coverage Notes
ZIP codes can cover multiple neighborhoods and unincorporated areas. Use ZIP 98040 for mail delivery and general location reference in
King County,
WA.
Coverage may include nearby neighborhoods and adjacent unincorporated areas commonly associated with Mercer Island.
Related ZIP Codes (Nearby)
Explore other postal codes near Mercer Island within WA.
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Frequently Asked Questions
What is the primary city for ZIP code 98040?
The primary city for this ZIP code is Mercer Island, located in WA.
In which county is 98040 located?
ZIP code 98040 is situated within King County, WA.
What are the coordinates for 98040?
The approximate center point is 47.56030 (Latitude) and -122.22810 (Longitude).
Is ZIP code 98040 active?
This page lists ZIP 98040 as Listed based on the latest refresh date shown above.
Does ZIP 98040 cover multiple areas?
Yes. Many ZIP codes cover multiple neighborhoods or nearby areas. For exact boundaries, use official mapping tools.
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Methodology & Data Notes
How we build this page: We generate this page from a structured ZIP dataset and refresh key fields (city, county, and coordinates) during scheduled updates. Coordinates represent an approximate center point, not an official boundary map.
Sources: Public ZIP reference datasets and geographic coordinate references. If you use specific sources (e.g., USPS, Census), list them on your About/Methodology page.
Page updated: 2026-01-08