Contact us

How can we help you?

To find a warehouse near you or check trading hours, please see Find a warehouse.
If you have general questions about Costco, please refer to Member care.
If you need more help, please contact your local warehouse.


Any online enquiries?

Please contact our Member Care team on (03) 5316 7223 or send your inquiry to our Live Chat. Member Care’s operating hours are Monday to Friday 8am to 6pm, excluding public holidays.


How to become a Costco supplier?

Please contact our buying office on (02) 8527 6100.


Media enquiries

Contact our central marketing manager on (02) 8527 6100.


Costco Wholesale Australia regional home office


17-21 Parramatta Rd
Lidcombe NSW 2141

Mailing address

Mailing address:
PO Box 7196
Silverwater NSW 2128

Office hours

Office hours:
Mon–Fri: 8am–5pm
Closed public holidays