Banks by county in Iowa
99 counties in Iowa have offices of 2 or more FDIC-insured institutions with deposits, by the FDIC’s newest Summary of Deposits, largest deposits first. A county with one bank is on that bank’s page.
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| County | Deposits | Institutions |
|---|---|---|
| Polk County | $32.2 billion | 39 |
| Linn County | $7.2 billion | 26 |
| Scott County | $5.3 billion | 17 |
| Johnson County | $4.9 billion | 17 |
| Dubuque County | $3.6 billion | 9 |
| Woodbury County | $3.4 billion | 20 |
| Story County | $3.1 billion | 21 |
| Sioux County | $2.9 billion | 9 |
| Black Hawk County | $2.7 billion | 13 |
| Dallas County | $2.6 billion | 27 |
| Pottawattamie County | $2.5 billion | 13 |
| Clayton County | $1.9 billion | 8 |
| Cerro Gordo County | $1.8 billion | 9 |
| Des Moines County | $1.5 billion | 11 |
| Cass County | $1.5 billion | 7 |
| Carroll County | $1.4 billion | 9 |
| Plymouth County | $1.4 billion | 8 |
| Clinton County | $1.4 billion | 7 |
| Marshall County | $1.4 billion | 11 |
| Lee County | $1.4 billion | 6 |
| Warren County | $1.4 billion | 7 |
| Dickinson County | $1.3 billion | 8 |
| Muscatine County | $1.3 billion | 7 |
| Winneshiek County | $1.3 billion | 9 |
| Clay County | $1.2 billion | 7 |
| Marion County | $1.2 billion | 10 |
| Hardin County | $1.2 billion | 7 |
| Bremer County | $1.0 billion | 8 |
| O'Brien County | $1.0 billion | 9 |
| Washington County | $991.6 million | 6 |
| Webster County | $980.2 million | 8 |
| Buena Vista County | $969.0 million | 6 |
| Kossuth County | $951.9 million | 9 |
| Grundy County | $947.2 million | 7 |
| Delaware County | $917.6 million | 6 |
| Jasper County | $892.0 million | 9 |
| Allamakee County | $857.7 million | 6 |
| Benton County | $792.8 million | 11 |
| Lyon County | $758.6 million | 6 |
| Chickasaw County | $756.8 million | 8 |
| Crawford County | $751.4 million | 6 |
| Jones County | $731.2 million | 7 |
| Buchanan County | $726.3 million | 6 |
| Boone County | $722.2 million | 8 |
| Mitchell County | $715.3 million | 6 |
| Jackson County | $714.9 million | 6 |
| Page County | $674.2 million | 7 |
| Jefferson County | $664.6 million | 5 |
| Hamilton County | $661.5 million | 5 |
| Winnebago County | $644.6 million | 4 |
| Greene County | $644.3 million | 6 |
| Butler County | $639.5 million | 5 |
| Mills County | $630.6 million | 6 |
| Ida County | $606.3 million | 4 |
| Floyd County | $600.0 million | 4 |
| Shelby County | $597.3 million | 5 |
| Howard County | $593.8 million | 4 |
| Mahaska County | $588.6 million | 7 |
| Wright County | $588.1 million | 6 |
| Wapello County | $584.9 million | 7 |
| Poweshiek County | $580.4 million | 7 |
| Fayette County | $571.1 million | 8 |
| Guthrie County | $567.1 million | 6 |
| Sac County | $551.2 million | 10 |
| Union County | $522.8 million | 5 |
| Henry County | $513.1 million | 6 |
| Franklin County | $488.4 million | 4 |
| Cherokee County | $486.9 million | 5 |
| Harrison County | $473.3 million | 8 |
| Madison County | $465.8 million | 4 |
| Calhoun County | $460.9 million | 5 |
| Cedar County | $443.7 million | 5 |
| Tama County | $415.7 million | 8 |
| Monona County | $401.7 million | 9 |
| Iowa County | $398.7 million | 7 |
| Hancock County | $381.2 million | 5 |
| Keokuk County | $380.2 million | 7 |
| Montgomery County | $375.4 million | 3 |
| Humboldt County | $371.2 million | 4 |
| Pocahontas County | $349.2 million | 6 |
| Emmet County | $345.5 million | 4 |
| Palo Alto County | $318.0 million | 4 |
| Clarke County | $312.1 million | 3 |
| Adair County | $307.0 million | 4 |
| Davis County | $282.9 million | 3 |
| Monroe County | $274.8 million | 3 |
| Louisa County | $273.8 million | 4 |
| Audubon County | $268.0 million | 3 |
| Appanoose County | $264.5 million | 5 |
| Osceola County | $237.1 million | 4 |
| Fremont County | $233.3 million | 5 |
| Taylor County | $230.4 million | 4 |
| Worth County | $222.5 million | 3 |
| Van Buren County | $221.0 million | 5 |
| Decatur County | $198.2 million | 5 |
| Wayne County | $195.6 million | 4 |
| Lucas County | $175.1 million | 3 |
| Ringgold County | $140.6 million | 4 |
| Adams County | $135.8 million | 3 |
Sources
- NCUA 5300 Call Report — quarterly data (every credit union, every quarter from March 1994) — National Credit Union Administration · U.S. Government work · retrieved September 27, 2026
- FDIC failures — every bank failure and assistance transaction since 1934 — Federal Deposit Insurance Corporation · Public domain — U.S. Government work
- FDIC summary — insured institutions, offices, assets and deposits by state and year since 1934 · Public domain — U.S. Government work
- FDIC BankFind — institutions (every charter the FDIC has insured, active and inactive) · Public domain — U.S. Government work · retrieved September 30, 2026
- NCUA credit-union sites — Credit Union Branch Information (the newest quarter) — National Credit Union Administration · U.S. Government work · retrieved September 27, 2026
- FDIC BankFind — locations (every current office of an FDIC-insured institution) — Federal Deposit Insurance Corporation · Public domain — U.S. Government work · retrieved September 30, 2026
- FDIC Summary of Deposits — every office's deposits at June 30, 1994 to the newest survey · Public domain — U.S. Government work · retrieved September 27, 2026
- Census Bureau population estimates — nation and states, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
Compiled automatically from NCUA 5300 Call Report — quarterly data (every credit union, every quarter from March 1994), FDIC failures — every bank failure and assistance transaction since 1934, FDIC summary — insured institutions, offices, assets and deposits by state and year since 1934, FDIC BankFind — institutions (every charter the FDIC has insured, active and inactive), NCUA credit-union sites — Credit Union Branch Information (the newest quarter), FDIC BankFind — locations (every current office of an FDIC-insured institution), FDIC Summary of Deposits — every office's deposits at June 30, 1994 to the newest survey and Census Bureau population estimates — nation and states, with components of change by a checked SQL query · Editor: Kian O'Connor · How this site is built
Data retrieved