Costco Complaints Number and Email Support

If you looking for Costco complaints number or want to make complaint to Costco? Using below contact method, you can seek instant assistance by contacting Costco Customer Support.

If you are facing some issue or queries regarding Costco services or products, or want to make complaint to Costco, here you will get all the information about how to contact Costco complaint department using different ways like customer service number, head office address, email address and social media support.

Costco complaints phone number, email and Corporate Office

Costco phone number 1-800-774-2678
Medical Questions 866-516-0927
Email ID Support
Official website
Costco head office phone number (425) 313-8100
Costco corporate office address 999 Lake Dr, Issaquah, WA 98027

How do I make complaint to Costco?

Costco provides customers with the best possible service. If you haven’t received the service you expected, you have the right to make a complaint.

Different ways to Make complaint to Costco

Make complaint by Phone – 1-800-774-2678

Call on Costco complaints number at 1-800-774-2678. This is the best and simple way to directly contact with Costco customer service department. They say the vast majority of complaints are successfully resolved at this stage. Using this number you can solve your problem or questions.

Make Complaint by Email

Another best option to seek assistance from Costco customer support is by using Costco Customer Service Email. If you would like to contact Costco online, you can send email to the customer care team using their email at

Costco Contact Page

You can also find different contact way to get in touch with Costco customer service team using their Customer Service Page.

Costco Social Media Support

You can also contact their customer expert team using their social media account such as, facebook, Twitter, Instagram etc.

Customer service hours of Costco

Day Opening Hours Closing Hours
Monday 06:00 AM 06:00 PM
Tuesday 06:00 AM 06:00 PM
Wednesday 06:00 AM 06:00 PM
Thursday 06:00 AM 06:00 PM
Friday 06:00 AM 06:00 PM
Saturday 08:00 AM 05:00 PM
Sunday 08:00 AM 05:00 PM

Contact Costco Headquarters

Costco corporate office address:

999 Lake Dr, Issaquah, WA 98027

Costco head office phone number: (425) 313-8100

See Also: Wells Fargo Complaints Number and Email Support

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