Phone:
1-800-955-2292
Email:
This information has not been added
Fax:
This information has not been added
Mail:
PO Box 34331
Seattle, WA 98124
Additional Contact Information
General Member Service: 1-800-774-2678
Business Delivery Member Service: 1-800-788-9968
Costco Travel: 1-877-849-2730
Costco.com Pharmacy: 1-800-607-6861
Costco’s corporate offices are located at:
999 Lake Drive
Issaquah, WA 98027