When you mention the largest banks in the U.S it could differ vastly because if you are referring to the largest value trading bank in the U.S it will not be a U.S bank but an international bank that trade in the U.S. This would be ICBC.
There are several large banks. Some of these banks are considered to be large according to number of branches while others are the biggest according to assets.
Below is a list of largest banks determined by the Federal Reserve based on assets. These banks are owned by U.S and trade in the U.S
JP Morgan Chase is by far the largest bank. They hold at least $2.4 trillion in worldwide assets.
Bank of America
Wells Fargo
Citi bank
U.S bank/U.S bankcorp
PNC
Capital One
TD bank