Corporate Headquarters
Costco Wholesale Corporation — Headquarters Address & ZIP Code
This is the corporate office. Costco separately publishes this postal mailing route: PO Box 34331, Seattle, WA 98124, USA.
Official Mailing Address
Costco Wholesale Corporation
Costco Wholesale Corporation
999 Lake Drive
Issaquah, WA 98027
UNITED STATES
Form-Filling Cheatsheet
How to fill in vendor registration, tax (W-9), and B2B shipping forms for Costco Wholesale Corporation:
| Form Field Name | Exact Value to Enter |
|---|---|
| Recipient / Organization | Costco Wholesale Corporation |
| Address Line 1 | 999 Lake Drive |
| Office / Address Line 2 | Leave blank |
| City | Issaquah |
| State / Province | WA |
| ZIP / Postal Code | 98027 |
| Country | UNITED STATES |
Official sources
Frequently Asked Questions
What postal code should I enter?
Use 98027 for the address shown for Costco Wholesale Corporation. Other offices may use different codes.
Can I use this address as my billing or registered business address?
This is an address for Costco Wholesale Corporation. Use your own card issuer’s billing address or your business’s documented address on your forms; a company headquarters address is not a substitute.