FDIC-insured bank
Grinnell State Bank — Grinnell, IA
Bank headquartered in Grinnell, Iowa, part of GRINNELL BANCSHARES INC.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 814 4th Ave Grinnell, IA 50112 |
| County | Poweshiek |
| Website | www.grinnell.bank |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 11347 |
| Federal Reserve RSSD ID | 783246 |
| Status | Active |
| Charter class | NM (STATE) |
| Holding company | GRINNELL BANCSHARES INC |
| Domestic offices | 4 |
| Financials as of | June 30, 2026 |
How to find your Grinnell State Bank routing number
FDIC does not publish ABA routing numbers, and many banks use different routing numbers by state or by account type. The reliable places to find yours: the bottom left of a check from this bank, the "account details" screen in its online banking, or its official website at www.grinnell.bank.
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Offices nearest to headquarters
| Grinnell State Bank main office Grinnell, IA |
814 4th Ave, 50112 |
| Marengo Branch Marengo, IA |
1101 Court Ave, 52301 |
| Johnston Branch Johnston, IA |
5601 Merle Hay Rd, 50131 |
| Polk City Branch Polk City, IA |
205 Broadway St, 50226 |
Where Grinnell State Bank has offices
Cities with the most Grinnell State Bank offices
Largest banks headquartered elsewhere in Iowa
| Principal Bank Des Moines | $9.84 billion |
| Bankers Trust Company Des Moines | $7.83 billion |
| Hills Bank and Trust Company Hills | $4.79 billion |
| West Bank West Des Moines | $4.03 billion |
| Northwest Bank Spencer | $3 billion |
| Cedar Rapids Bank and Trust Company Cedar Rapids | $2.90 billion |
| Quad City Bank and Trust Company Bettendorf | $2.77 billion |
| Fidelity Bank & Trust Dubuque | $2.60 billion |
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