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  2. What is the zip code of Mercer Island, WA, 98040

Mercer Island (WA) Zip Code is 98040 Latest Details Jul, 2025

Updated: 08-07-2025

Mercer Island (WA) zip Code is 98040, Postal Code details. Mercer Island is located in state WA, United States.

Find Zip Code 98040 Details

ZIP code 98040 is located in Mercer Island WA in the United States.

Postal Code United States Zip Code 98040 Latest update Mercer Island, WA
Zip Code / Postal Code 98040

City

Mercer Island

State Code

WA

County

King, United States

Postal Locations

Mercer Island, WA - Zip Code is - 98040

Postal

United States Postal Service USPS Link

Delivery Type

Package Delivery and first class mail.

The zip code 98040 is an essential part of the postal system in Mercer Island, WA. Located in a vibrant part of the city, this zip code covers a variety of neighborhoods, offering residents and businesses a unique blend of suburban comfort and urban convenience. Whether you're looking to send mail, relocate, or simply learn more about the area, Mercer Island has a lot to offer.

FAQ about Zip Code 98040, Mercer Island, (WA)

What is Zip code Mercer Island?

Mercer Island Zip Code: 98040, used by the Mercer Island Post Office and USPS, is a Zone Improvement Plan code that ensures faster, accurate mail delivery in King, WA. Represented by the American Postal Workers Union (APWU), USPS oversees postal operations.

What is Postal code of area Mercer Island?

Mercer Island Postal Code is: 98040

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