ZIP Code 98040
Mercer Island · King, Washington
98040 is the ZIP code of Mercer Island in King, Washington, United States.
- ZIP Code
- 98040
- County
- King
- State
- Washington
- Country
- United States
Place with ZIP code 98040
| Place | County | Location |
|---|---|---|
| Mercer Island | King | 47.560, -122.228 |
Near Seattle
The nearest major city is Seattle, about 9 km away.
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 98040?
Mercer Island.
Which county and state is 98040 in?
King, Washington, United States.
What is the nearest major city to 98040?
Seattle, about 9 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.