First Western Bank
| Status: | Inactive as of 04/01/1989 |
| Merger - Without Assistance | |
| Successor Bank: | The First Western Bank Custer |
| Headquarters: | First Western Bank 449 Mt. Rushmore Road Custer, SD 57730 |
| Established: | 01/01/1890 |
| FDIC Insurance: | 01/01/1934 |
| FDIC Cert: | #12645 |
| Charter Class: | Commercial bank, state charter and Fed member, supervised by the Federal Reserve (FRB) |
| Total Assets: | $25,756,000 |
| Total Deposits: | $23,342,000 |
History
| 1890-01-01 | Institution established: Original name:Custer County Bank, Custer City, So. Dak. | |
| 1988-10-28 | Changed name to First Western Bank | |
| 1989-04-01 | Merged into and subsequently operated as part of The First Western Bank Custer (1685) in CUSTER, SD | |
| 1989-04-01 | Changed name to The First Western Bank Custer (1685) | |
| 2006-09-29 | Merged into and subsequently operated as part of First Western Bank (488) in WALL, SD | |
| 2008-02-20 | Changed institution class to INSURED COMMERCIAL OR SAVINGS BANKS, STATE, MEMBERS FRS | |
| 2009-09-26 | Merged into and subsequently operated as part of First Interstate Bank (1105) in BILLINGS, MT | |
| 2009-09-26 | Acquired The First Western Bank Sturgis (26773) in STURGIS, SD | |
| 2014-10-18 | Acquired Mountain West Bank, National Association (33314) in HELENA, MT | |
| 2015-07-25 | Acquired United Bank (18772) in ABSAROKEE, MT | |
| 2016-08-13 | Acquired Flathead Bank of Bigfork, Montana (20382) in BIGFORK, MT | |
| 2017-08-12 | Acquired Bank of the Cascades (22407) in BEND, OR | |
| 2018-11-10 | Acquired Inland Northwest Bank (27601) in SPOKANE, WA | |
| 2019-04-08 | Acquired Community 1st Bank (58576) in POST FALLS, ID | |
| 2019-04-08 | Acquired Idaho Independent Bank (33845) in COEUR D ALENE, ID |