If you are a holder of the Costco Visa credit card issued by Citibank, you will log in to your card account via the Citi Web site at https://www.citi.com/credit-cards/citi.action.
The login page will look like this (login area circled in red):
- If you haven’t logged in to your Costco credit card online previously, go here to register your card to get access.
- If you’ve forgotten your User ID or password, go here for help.
- If you are still having trouble logging in, the Costco/Citicards credit card customer service phone number is 800-347-4934.