| 1 | U.S. Bank | USA |
| 2 | UBank | Israel |
| 3 | UBS | Switzerland |
| 4 | UCO Bank | India |
| 5 | UFC Bank | Russia |
| 6 | Ukrainian Professional Bank | Ukraine |
| 7 | Ukrgasbank | Ukraine |
| 8 | UkrSibbank | Ukraine |
| 9 | Ulster Bank | Ireland |
| 10 | UMB Bank | USA |
| 11 | Umpqua Bank | USA |
| 12 | Unibank | Armenia |
| 13 | Unicaja | Spain |
| 14 | Unico Bank | USA |
| 15 | UniCredit Bank CZ | Czech Republic |
| 16 | UniCredit Bank Russia | Russia |
| 17 | UniCredit Banka Slovenija | Slovenia |
| 18 | UniCredit Bulbank | Bulgaria |
| 19 | UniCredit Group | Italy |
| 20 | Union Bancaire Privee | Switzerland |
| 21 | Union Bank | USA |
| 22 | Union Bank of Colombo | Sri Lanka |
| 23 | Union Bank of India (UBI) | India |
| 24 | Union Bank of Israel | Israel |
| 25 | Union Bank of Nigeria | Nigeria |
| 26 | Union Bank UK | UK |
| 27 | UnionBank of the Philippines | Philippines |
| 28 | Unistream Commercial Bank | Russia |
| 29 | United Bank | USA |
| 30 | United Bank (Qatar Branch) | Qatar |
| 31 | United Bank for Africa | Nigeria |
| 32 | United Bank Limited | Pakistan |
| 33 | United Bank of Michigan | USA |
| 34 | United Bulgarian Bank | Bulgaria |
| 35 | United Community Bank | USA |
| 36 | United Cumberland Bank | USA |
| 37 | United Fidelity Bank, fsb | USA |
| 38 | United Overseas Bank | Singapore |
| 39 | United Taiwan Bank | Belgium |
| 40 | United Texas Bank | USA |
| 41 | Unity Bank | Nigeria |
| 42 | Universal Bank | Uzbekistan |
| 43 | Universal Capital Bank | Montenegro |
| 44 | URALSIB | Russia |
| 45 | Urban Partnership Bank | USA |
| 46 | Uttara Bank Limited | Bangladesh |
| 47 | Uwharrie Bank | USA |
