United National Bank of Iowa
| Status: | Inactive as of 08/08/2000 |
| Merger - Without Assistance | |
| Successor Bank: | Citizens Bank |
| Headquarters: | United National Bank of Iowa 900 Illinois Sidney, IA 51652 |
| Established: | 08/30/1915 |
| FDIC Insurance: | 06/05/1934 |
| FDIC Cert: | #14446 |
| Charter Class: | Commercial bank, national (federal) charter and Fed member, supervised by the Office of the Comptroller of the Currency (OCC) |
| Total Assets: | $31,736,000 |
| Total Deposits: | $26,403,000 |
History
| 1915-08-30 | Institution established: Original name:Thurman State Savings Bank | |
| 1970-11-30 | Changed name to Thurman State Bank | |
| 1984-01-10 | Changed name to United National Bank of Iowa | |
| 1984-06-11 | Moved bank headquarters from THURMAN, IA to SIDNEY, IA | |
| 1992-03-02 | Acquired American National Bank (26670) in BEDFORD, IA | |
| 2000-08-08 | Acquired United National Bank of Iowa in SIDNEY, IA | |
| 2000-08-08 | Acquired Citizens Bank (18607) in CHARITON, IA | |
| 2000-08-08 | Acquired Iowa State Bank (22011) in HAMBURG, IA | |
| 2000-08-08 | Merged into and subsequently operated as part of Citizens Bank (18608) in MOUNT AYR, IA | |
| 2003-02-24 | Merged into and subsequently operated as part of Citizens Bank (35516) in CLIVE, IA | |
| 2003-02-24 | Acquired Citizens Bank of Princeton (1628) in PRINCETON, MO | |
| 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 | Acquired Great Western Bank (8327) in OMAHA, NE | |
| 2007-01-12 | Merged into and subsequently operated as part of Great Western Bank (15289) in WATERTOWN, SD | |
| 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 |