(CNN) - Capital One is in the lead for the most complained about credit card.
That's according to numbers from the U.S. Public Interest Research Group.
The complaints went to the Consumer Financial Protection Bureau starting in 2011.
Capital One got the most with 21 percent of the complaints. It was followed by Citibank, Bank of America and Chase.
Capital One says its research shows differently and that it's committed to resolving any issues with customers.
Copyright 2014 CNN. All rights reserved.