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Costco Headquarters Contacts. Corporate office address, contact information and phone numbers for the Costco Headquarters. Write a review or read complaints from other customers. Costco Wholesale Corporation, or Costco, operates a chain of 750 membership-only warehouse clubs. Costco Headquarters Phone Number and Address. Company Website www.costco.com Corporate Address 999 Lake Drive Issaquah, WA 98027 Company Contact W. Craig Jelinek Position Chairman, President and CEO Phone Number (425) 313-8100 Fax Number (425) 313-8103 Twitter IDs @CostcoTweets What is Costco's Corporate Office Phone Number? Costco's Headquarters phone number is: 1-425-313-8100. What is Costco's Customer Service Phone Number? Costco's Customer Support phone number is: 1-866-231-9731 or 1-800-774-2678 (Toll-Free). The Toll-Free Costco support phone number at 1-800-220-6000 reportly is easiest to through on. How do I Contact Costco Customer Support? Call the numbers listed above or contact Costco via: Costco's Email Address: Costco does not officially offer email support. But we have located a customer support email address that reportedly works: costcocare@costco.com. Costco's Contact Us customer service page can be found here. You can also contact Costco Live Chat to chat with a customer service representative. Costco's Customer Service Mailing Address is: Costco PO Box 34331 Seattle, WA 98124 USA Contact Costco on Social Media: Costco on Twitter: @Costco or @CostcoCanada Costco on Facebook: www.facebook.com/costco Costco Headquarters Executive Team. Costco's management team consists of: W. Craig Jelinek - CEO of Costco Richard A. Galanti - Vice President and Chief Financial Officer Jeffrey H. Brotman Pat Callans Roger A. Campbell Richard C. Chavez John B. Gaherty Jaime Gonzalez Bruce A. Greenwood Robert D. Hicok Dennis A. Hoover Dennis Knapp Franz Lazarus Jeffrey Long Jeffrey Lyons John McKay Russ Miller Ali Moayeri Paul G. Moulton James P. Murphy Rich Olin David S. Petterson Joseph P. Portera Pierre Riel Ginnie M. Roeglin Timothy L. Rose Yoram Rubanenko Doug W. Schutt John Thelan Ron Vachris Dennis R. Zook Costco Board of Directors. James Sinegal - Chairman of the Board Jeffrey Brotman - Board Member Richard Galanti - Board Member Jeff Raikes - Board Member Charles Munger - Board Member Jill Ruckelshaus - Board Member John Stanton - Board Member Richard Libenson - Board Member James McElwee - Board Member Daniel Evans - Board Member Craig Jelinek - Board Member Sue Decker - Board Member John Meisenbach - Board Member Maggie Wilderotter - Board Member Hamilton James - Board Member DISCLAIMER: Names, phone numbers and email addresses are for informational purposes only and are up-dated periodically. If you detect any errors, then please let us know. Please add your review or complaint below. REVIEWS - Rate This Company with 1 to 5 Stars.