Bank One Corporation is a company that was acquired by JP Morgan Chase and Company in 2004 and was named after the acquiring company. Bank One Corporation is located in Chicago, Illinois. Nowadays it is the sixth largest bank in the USA. The bank is the largest issuer of Visa card in the world. Bank One was created in 1874 when the First Bank of Ohio together with other banks in the state all were united into one Bank One Corporation. Then some more banks of the company appeared in the other states but all of them were named Bank One. Please try to contact Bank One Customer Service directly prior to posting any complaints on this site.