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  • Customer Service

    Welcome to Customer Service. How can we help you?

    Call Us

    Corporate Mailing Address
    PO Box 34331
    Seattle, WA 98124

    Corporate Physical Address
    999 Lake Drive
    Issaquah, WA 98027

    Email Us

    Customer Service Member Service: 1-800-955-2292
    General Member Service: 1-800-774-2678
    Business Delivery Member Service: 1-800-788-9968

    Costco Travel
    1-877-849-2730 Pharmacy