Supplier Inclusion Contacts
Give Us a Call/Email
Costco Corporate
Call Monday to Friday, 6am to 6pm PT
1-800-774-2678
Northern California Region Buying Office
Call Monday to Friday, 6am to 6pm PT
714-534-7080
Los Angeles Region Buying Office
Call Monday to Friday, 6am to 6pm PT
714-534-7080
San Diego Region Buying Office
Call Monday to Friday, 6am to 6pm PT
858-812-1400
Texas Region Buying Office
Call Monday to Friday, 6am to 6pm CST
972-246-3000
Midwest Region Buying Office
Call Monday to Friday, 6am to 6pm CST
630-581-6200