Marine Midland Bank was an American bank formerly headquartered in Buffalo, New York, with several hundred branches throughout the state of New York. In 1998, branches extended to Pennsylvania. It was acquired by HSBC in 1980, and changed its name to HSBC Bank USA in 1999. As a result of several transactions since the turn of the millennium, much of what was once Marine Midland is now part of KeyBank with the exception of Downstate New York and Pennsylvania, that is now part of Citizens Bank. Branches in Seattle are part of Cathay Bank.

HSBC Bank USA, National Association, an American subsidiary of the British banking group HSBC, is a bank with its operational head office in New York City and its nominal head office in McLean, Virginia. HSBC Bank USA, N.A. is a national bank chartered under the National Bank Act, and thus is regulated by the Office of the Comptroller of the Currency (OCC), a part of the U.S. Department of the Treasury. The company has 22 branch locations.