King County Post Office

Find King County Washington post offices and USPS mailing boxes. Post offices provide information on bulk mail services, domestic mail delivery, international shipping, change of address, mail forwarding, PO boxes, and passport services.


Auburn Post Office 11 3rd Street Northwest Auburn WA 98002 253-333-1377


Auburn Twin Lakes Post Office 1815 Southwest Campus Drive Federal Way WA 98023 253-952-4563

Ballard Post Office 5706 17th Avenue Northwest Seattle WA 98107 206-781-4656

Bellevue Post Office 1171 Bellevue Way Northeast Bellevue WA 98004 425-453-5655

Bitter Lake Post Office 929 North 145th Street Seattle WA 98133 206-364-0663

Black Diamond Post Office 25228 Baker Street Black Diamond WA 98010 360-886-9429

Bothell Post Office 10500 Beardslee Boulevard Bothell WA 98011 425-482-9755

Broadway Post Office 101 Broadway Seattle WA 98122 206-324-5474

Burien Post Office 609 Southwest 150th Street Burien WA 98166 206-248-8647

Burton Post Office 23830 Vashon Highway Southwest Vashon WA 98070 206-463-2091

Carnation Post Office 4440 McKinley Avenue Carnation WA 98014 425-333-6451

Columbia Post Office 3727 South Alaska Street Seattle WA 98118 206-721-2368

Covington Branch Post Office 17300 Southeast 270th Place Covington WA 98042 253-639-6833

Crossroads Post Office 15731 Northeast 8th Street Bellevue WA 98008 425-401-0892

Des Moines Post Office 2003 South 216th Street Des Moines WA 98198 206-824-3647

Downtown Kent Post Office 216 West Gowe Street Kent WA 98032 253-520-7576

Downtown Renton Post Office 314 Williams Avenue South Renton WA 98057 425-227-6304

Duvall Post Office 26400 Northeast Valley Street Duvall WA 98019 425-788-5645

East Union Post Office 1110 23rd Avenue Seattle WA 98122 206-328-9712

Enumclaw Post Office 1742 Cole Street Enumclaw WA 98022 360-825-8325

What is a Post Office?

A post office is a local branch of the United States Postal Service, where mail is received and dispatched to individuals and businesses in a given community. A post office usually has postal clerks who receive and process mail, and it's also the place from which mail carriers pick up mail they deliver on their local routes. The office handles USPS business, including mail and package sorting, delivery and forwarding, sales of stamps and other postal supplies, change-of-address requests, and other administrative functions.

In some small communities, the local post office may be located within a commercial business. In communities both large and small, a post office may serve as a local passport office at which passport applications are received and undergo initial processing.