Every FDIC-insured bank branch in Grundy County, Illinois as of June 30, 2025. County land area: 418 square miles, 4.8 branches per 100 sq mi.
| Institution | Branches | Deposits |
|---|---|---|
| Old National Bank | 4 | $353.6M |
| Grundy Bank | 3 | $334.3M |
| Busey Bank | 2 | $205.5M |
| BMO Bank National Association | 2 | $192.3M |
| Midland States Bank | 1 | $104.3M |
| Bank of Pontiac | 1 | $29.0M |
| Heartland Bank and Trust Company | 1 | $35.1M |
| OSB Community Bank | 1 | $59.0M |
| First Federal Savings Bank | 1 | $32.2M |
| CIBC Bank USA | 1 | $180.1M |
| First Secure Community Bank | 1 | $36.6M |
| American Commercial Bank & Trust, National Association | 1 | $23.1M |
| JPMorgan Chase Bank, National Association | 1 | $128.9M |