Iowa State Bank
| Status: | Inactive as of 08/08/2000 |
| Merger - Without Assistance | |
| Successor Bank: | Citizens Bank |
| Headquarters: | Iowa State Bank 1020 Main Street Hamburg, IA 51640 |
| Established: | 02/01/1923 |
| FDIC Insurance: | 05/09/1975 |
| FDIC Cert: | #22011 |
| Charter Class: | Commercial bank, state charter and Fed nonmember, supervised by the FDIC |
| Total Assets: | $35,428,000 |
| Total Deposits: | $30,736,000 |
History
| 1923-02-01 | Institution established but was not FDIC insured. Original name: Iowa State Bank (90113) | |
| 1975-05-09 | FDIC certificate number changed from (90113) to | |
| 1975-05-09 | Became FDIC insured. | |
| 2000-08-08 | Acquired Iowa State Bank in HAMBURG, IA | |
| 2000-08-08 | Acquired United National Bank of Iowa (14446) in SIDNEY, IA | |
| 2000-08-08 | Merged into and subsequently operated as part of Citizens Bank (18608) in MOUNT AYR, IA | |
| 2000-08-08 | Acquired Citizens Bank (18607) in CHARITON, IA | |
| 2003-02-24 | Acquired Citizens Bank of Princeton (1628) in PRINCETON, MO | |
| 2003-02-24 | Merged into and subsequently operated as part of Citizens Bank (35516) in CLIVE, IA | |
| 2003-03-31 | Changed name to Great Western Bank (35516) | |
| 2004-11-06 | Acquired Security State Bank (16951) in RED OAK, IA | |
| 2007-01-12 | Merged into and subsequently operated as part of Great Western Bank (15289) in WATERTOWN, SD | |
| 2007-01-12 | Acquired Great Western Bank (8327) in OMAHA, NE | |
| 2007-05-11 | Acquired Sunstate Bank (25333) in CASA GRANDE, AZ | |
| 2009-05-29 | Acquired International Bank (57223) in GREELEY, CO | |
| 2010-04-23 | Acquired F&M Bank-Iowa Central (10904) in MARSHALLTOWN, IA | |
| 2010-06-04 | Acquired TierOne Bank (29341) in LINCOLN, NE as part of a government assisted transaction. | |
| 2012-06-22 | Acquired First Federal Savings Bank of Iowa (30742) in FORT DODGE, IA | |
| 2016-05-16 | Acquired Home Federal Bank (28092) in SIOUX FALLS, SD | |
| 2017-07-05 | Moved bank headquarters from WATERTOWN, SD to SIOUX FALLS, SD |