ZIP Code 98040 – Mercer Island, Washington | ZipsCode.us
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ZIP Code 98040
Mercer Island, Washington · King
ZIP code 98040 belongs to the city of Mercer Island in Washington (King). See all Washington ZIP Codes.
ZIP code 98040 belongs to Mercer Island, Washington, in King. If you are mailing a letter or package to this area, use Mercer Island, WA 98040 in the address. On this page you will find the city and county for 98040, nearby ZIP codes in the same county, and free tools to look up any address in this ZIP code.
What City Is ZIP Code 98040?
The city for ZIP code 98040 is Mercer Island, Washington. When you write an address in this area, the correct format is: Name, Street Address, Mercer Island, WA 98040.
ZIP Code 98040 County and State
ZIP code 98040 is located in King, Washington. For a complete list of cities and ZIP codes across the state, see the Washington ZIP Codes page.
Nearby ZIP Codes in King
These ZIP codes are in the same county as 98040:
ZIP Code 98040 on the Map
The map below shows the approximate center of ZIP code 98040, near Mercer Island, Washington. You can zoom in and drag the map to explore the area.
Map center is approximate (ZIP area center, around 47.5603, -122.2281). Map data © OpenStreetMap.
Population and Demographics of ZIP Code 98040
According to public U.S. Census Bureau data, ZIP code 98040 is home to a community in Washington. The figures below come from the U.S. Census and the American Community Survey (ACS).
Source: U.S. Census Bureau, American Community Survey (ACS) 2023 5-year estimates and 2023 Gazetteer. Figures are estimates and change with each new survey.
Find an Address in ZIP Code 98040
Need the full ZIP+4 code for a specific street address in Mercer Island? Use the free ZIP+4 Lookup tool, or find any ZIP code from a street address with the ZIP Code by Address tool.
Frequently Asked Questions
What city is ZIP code 98040?
ZIP code 98040 is for Mercer Island, Washington.
What county is ZIP code 98040 in?
ZIP code 98040 is in King, Washington.
What state is ZIP code 98040 in?
ZIP code 98040 is in Washington (WA).
How do I find the ZIP+4 for an address in 98040?
Use the free ZIP+4 Lookup tool with the full street address to get the complete 9-digit ZIP code.
What are the nearby ZIP codes to 98040?
Nearby ZIP codes include 98001 (Auburn), 98002 (Auburn), 98003 (Federal Way), 98004 (Bellevue), 98005 (Bellevue).
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