Bank · FDIC insured
Grinnell State Bank
Top CarrotA $498.6M bank headquartered in Grinnell, IA, with 4 branches in Iowa. Best rates: CDs 4.25% and savings 1.00% APY.
Grinnell State Bank Carrot Score
Carrot ScoreTop Carrot
Higher than 79% of U.S. banks and credit unions
#16 of 53 in Des Moines, IA metroHow the score works →
Deposits are federally insured by the FDIC up to $250,000 per depositor.
About Grinnell State Bank
Organized in 1925 by local businessmen as an independent community bank, Grinnell State Bank has been owned and operated by the Jones family since 1954.
The bank provides deposit, loan, and financial services across Iowa locations in Grinnell, Johnston, Marengo, and Polk City.
- Headquarters
- 814 4th Ave, Grinnell, IA 50112
- FDIC certificate
- 11347 ↗
Branches
4 branches in Iowa
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Iowa
4 branches
Des Moines area · 2
- Johnston Branch5601 Merle Hay Rd, Johnston, IA 50131Directions
- Polk City Branch205 Broadway St, Polk City, IA 50226Directions
Grinnell area · 1
- Grinnell State BankMain office814 4th Ave, Grinnell, IA 50112Directions
Marengo area · 1
- Marengo Branch1101 Court Ave, Marengo, IA 52301Directions
Walk-in offices from the FDIC directory as of September 4, 2026. Directions open Google Maps. A nearby branch doesn’t mean you can join or open an account.
Financial details
| Measure | This bank | Peers’ middle | Strongest quarter |
|---|---|---|---|
| CapitalLeverage ratio | 11.90% | 10.98% | 13.00% or more |
| Troubled loansNoncurrent | 0.47% | 0.42% | 0.09% or less |
| ProfitabilityReturn on assets | 0.98% | 1.24% | 1.68% or more |
| LendingLoans per $100 deposited | $108 | $81 | — |
- CapitalLeverage ratio11.90%Peers’ middle 10.98% · Top 25% 13.00%+
- Troubled loansNoncurrent0.47%Peers’ middle 0.42% · Top 25% ≤0.09%
- ProfitabilityReturn on assets0.98%Peers’ middle 1.24% · Top 25% 1.68%+
- LendingLoans per $100 deposited$108Peers’ middle $81
Compared with the 2,650 banks with $100 million to $1 billion in assets. The strongest quarter is what the best 25% of them reach: more capital and profit, fewer troubled loans. Lending has no better end.Troubled loans are noncurrent: 90 or more days late, or no longer earning interest.
Regulators’ own ratings of Grinnell State Bank are confidential. These figures are what it reports to the FDIC each quarter, set beside its peers; they aren’t a rating.