Costco Corporate Office
Costco is a discount retailer that competes with sams club with a membership based system.
Costco's Customer Service Number is 1-800-220-6000
Costco Corporate Headquarters:
999 Lake Drive
Issaquah, WA 98027
Phone Number: (425) 313-8100
Fax Number: (425) 313-8103
Stock Symbol: COST
Stock Symbol: COST
Email: info@costco.com