What is mailing address for Citibank Costco Visa card payment?

The mailing address for Citibank Costco Visa card payments is typically listed on your billing statement. As of my last update, it is often: Citibank, P.O. Box 9001037, Louisville, KY 40290-1037. However, it's best to verify this address on your statement or through the official Citibank website to ensure accuracy.