National Bank of Defiance
| Status: | Inactive as of 12/26/1980 |
| Merger - Without Assistance | |
| Successor Bank: | Maumee Valley National Bank |
| Headquarters: | National Bank of Defiance 414 Second Street Defiance, OH 43512 |
| Established: | 05/06/1965 |
| FDIC Insurance: | 05/06/1965 |
| FDIC Cert: | #19428 |
| Charter Class: | Commercial bank, national (federal) charter and Fed member, supervised by the Office of the Comptroller of the Currency (OCC) |
History
| 1965-05-06 | Institution established: Original name:National Bank of Defiance | |
| 1980-12-26 | Merged into and subsequently operated as part of Maumee Valley National Bank (14862) in DEFIANCE, OH | |
| 1980-12-26 | Changed name to Maumee Valley National Bank (14862) | |
| 1982-07-12 | Acquired The Farmers and Merchants' State and Savings Bank (8954) in MONTPELIER, OH | |
| 1982-07-12 | Acquired The Liberty State Bank (397) in LIBERTY CENTER, OH | |
| 1983-08-15 | Merged into and subsequently operated as part of Maumee Valley National Bank (6573) in DEFIANCE, OH | |
| 1984-12-22 | Merged into and subsequently operated as part of The Toledo Trust Company (777) in TOLEDO, OH | |
| 1988-02-01 | Changed name to Trustcorp Bank, Ohio (777) | |
| 1988-03-12 | Acquired Trustcorp Company, National Association (6631) in COLUMBUS, OH | |
| 1988-03-12 | Acquired Trustcorp Company, Dayton (26982) in DAYTON, OH | |
| 1990-01-22 | Changed name to Society Bank & Trust (777) | |
| 1993-08-23 | Merged into and subsequently operated as part of Society National Bank (17534) in CLEVELAND, OH | |
| 1994-09-16 | Acquired State Home Savings Bank, F.S.B. (27804) in BOWLING GREEN, OH | |
| 1996-06-17 | Changed name to KeyBank National Association (17534) | |
| 1996-06-17 | Acquired Keybank National Association (21735) in BRYAN, OH | |
| 1997-06-23 | Acquired Key Trust Company of Florida, National Association (27546) in NAPLES, FL | |
| 1997-06-30 | Acquired KeyBank National Association (1254) in SALT LAKE CITY, UT | |
| 1998-06-30 | Acquired Keybank National Association (34243) in BEDFORD, NH | |
| 1998-07-31 | Acquired KeyTrust Company National Association (33575) in CHEYENNE, WY | |
| 1999-08-16 | Reorganized. | |
| 2000-12-29 | Acquired Key Trust Company National Association (27177) in SEATTLE, WA | |
| 2000-12-29 | Acquired Key Trust Company of Ohio, National Association (33968) in CLEVELAND, OH | |
| 2000-12-29 | Acquired Key Trust Company of Indiana, National Association (33969) in INDIANAPOLIS, IN | |
| 2000-12-29 | Acquired Key Trust Company National Association (26596) in PORTLAND, ME | |
| 2000-12-29 | Acquired Key Trust Company National Association (90992) in ALBANY, NY | |
| 2003-01-17 | Acquired Union Bank & Trust (14708) in DENVER, CO | |
| 2003-11-20 | Reorganized. | |
| 2004-10-01 | Acquired Key Bank USA, National Association (34055) in CLEVELAND, OH | |
| 2004-11-12 | Acquired EverTrust Bank (27070) in EVERETT, WA | |
| 2005-08-01 | Acquired EverTrust Asset Management (57613) in SEATTLE, WA | |
| 2008-01-17 | Acquired Union State Bank (20119) in NANUET, NY | |
| 2014-09-30 | Acquired KeyTrust Company National Association (91385) in ANCHORAGE, AK | |
| 2016-10-08 | Acquired First Niagara Bank, National Association (16004) in BUFFALO, NY | |
| 2017-07-31 | Reorganized. |