| The Clinton National Bank | 235 Sixth Avenue, South, Clinton, IA 52732 | 1865-05-01 | $369.6 |
| The Emmet County State Bank | 101 North 6th Street, Estherville, IA 51334 | 1927-01-01 | $77.2 |
| The Exchange State Bank | 253 Broadway, Springville, IA 52336 | 1934-01-01 | $41.7 |
| The Farmers State Bank | 106 E. Cedar St, Marcus, IA 51035 | 1928-12-28 | $68.2 |
| The First National Bank in Creston | 101 West Adams Street, Creston, IA 50801 | 1871-01-01 | $205.0 |
| The First National Bank of Logan | 323 East 7th Street, Logan, IA 51546 | 1888-12-01 | $26.9 |
| The First National Bank of Manning | 401 Main Street, Manning, IA 51455 | 1886-01-01 | $88.9 |
| The First National Bank of Primghar | 108 South Hayes Avenue, Primghar, IA 51245 | 1889-11-11 | $29.2 |
| The First National Bank of Rembrandt | 101 E Main St, Rembrandt, IA 50576 | 1915-05-15 | $52.6 |
| The First National Bank of West Union | 115 North Vine Street, West Union, IA 52175 | 1934-01-01 | $111.6 |
| The First Trust & Savings Bank | 100 West Pine Street, Marcus, IA 51035 | 1935-01-01 | $46.7 |
| The Garnavillo Savings Bank | 101 S. Main Street, Garnavillo, IA 52049 | 1904-07-18 | $37.9 |
| The Home Trust & Savings Bank | 628 Main Street, Osage, IA 50461 | 1899-12-01 | $206.7 |
| The Libertyville Savings Bank | 2000 West Jefferson, Fairfield, IA 52556 | 1901-09-16 | $196.7 |
| The Security National Bank of Sioux City, Iowa | 601 Pierce Street, Sioux City, IA 51102 | 1884-01-01 | $716.9 |
| The Shelby County State Bank | 508 Court Street, Harlan, IA 51537 | 1909-08-02 | $224.6 |
| The State Bank | 1902 Hill Avenue, Spirit Lake, IA 51360 | 1928-10-05 | $62.0 |
| The State Bank of Toledo | 100 East High, Toledo, IA 52342 | 1927-01-01 | $105.2 |
| The Watkins Savings Bank | 202 First Street, Watkins, IA 52354 | 1892-01-01 | $66.9 |
| Titonka Savings Bank | 173 Main Street North, Titonka, IA 50480 | 1916-01-01 | $151.7 |
| Treynor State Bank | 15 East Main Street, Treynor, IA 51575 | 1923-06-01 | $219.8 |
| Tri-Valley Bank | 104 Main Street, Randolph, IA 51649 | 1917-01-01 | $71.6 |
| Two Rivers Bank & Trust | 222 North Main Street, Burlington, IA 52601 | 2005-05-02 | $668.0 |
| Union State Bank | 214 South First Street, Greenfield, IA 50849 | 1890-01-06 | $65.4 |
| Union State Bank | 201 West Court Avenue, Winterset, IA 50273 | 1935-01-02 | $72.4 |
| United Bank & Trust National Association | 2101 South Center Street, Marshalltown, IA 50158 | 2002-06-21 | $107.7 |
| United Bank and Trust Company | 400 Central Ave East, Hampton, IA 50441 | 1915-01-01 | $129.8 |
| United Bank of Iowa | 501-7 2nd Street, Ida Grove, IA 51445 | 1932-02-04 | $1,153.6 |
| United Community Bank | 1000 Okoboji Avenue, Milford, IA 51351 | 1931-06-10 | $188.4 |
| Valley Bank & Trust | 401 Main Street, Mapleton, IA 51034 | 1878-10-03 | $72.1 |
| Victor State Bank | 201 Washington Street, Victor, IA 52347 | 1928-04-11 | $43.5 |
| Walcott Trust and Savings Bank | 101 West Bryant Street, Walcott, IA 52773 | 1931-05-15 | $101.6 |
| Walker State Bank | 116 Greene Street, Walker, IA 52352 | 1946-05-20 | $39.2 |
| Washington State Bank | 121 S Marion Ave, Washington, IA 52353 | 1932-04-18 | $227.0 |
| Waukon State Bank | 22 West Main Street, Waukon, IA 52172 | 1871-01-01 | $119.8 |
| Wayland State Bank | 301 South Main Street, Mount Pleasant, IA 52641 | 1932-05-12 | $77.6 |
| Webster City Federal Savings Bank | 820 Des Moines St, Webster City, IA 50595 | 1934-06-01 | $90.0 |
| West Bank | 1601 22nd Street, West Des Moines, IA 50265 | 1893-01-01 | $1,256.9 |
| West Chester Savings Bank | 1060 West Monroe Street, Washington, IA 52353 | 1900-06-16 | $50.3 |
| West Iowa Bank | 319 S Broadway Ave, West Bend, IA 50597 | 1926-01-01 | $94.7 |
| West Liberty State Bank | 101 East Fourth Street, West Liberty, IA 52776 | 1934-05-31 | $79.0 |
| Westside State Bank | 401 First Street, Westside, IA 51467 | 1907-06-01 | $69.5 |
| White State Bank | 209 Ives Street, South English, IA 52335 | 1908-01-01 | $32.2 |
