PO Box 34331
Seattle, WA 98124
Costco's corporate offices are located at:
999 Lake Drive
Issaquah, WA 98027
Costco Member Service: 1-800-955-2292
Costco Pharmacy: 1-800-607-6861
General Member Service: 1-800-774-2678
Business Delivery Member Service: 1-800-788-9968
Costco Travel: 1-877-849-2730
品牌专区:http://pp.ppsj.com.cn/Costco/