Banks in Warren County, Illinois
6 active bank branches operated by 6 institutions, per FDIC records.
Active branches
6
Banks present
6
Deposits (2026)
$639M
Closings since 2020
3
1 openings
Largest banks by deposits in Warren County (2026)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| Midwest Bank | $325M | 50.9% | 1 |
| Security Savings Bank | $194M | 30.3% | 1 |
| Community National Bank in Monmouth | $48M | 7.5% | 1 |
| Fortress Bank | $42M | 6.6% | 1 |
| Morton Community Bank | $21M | 3.3% | 1 |
| CBI Bank & Trust | $9M | 1.4% | 1 |
Deposit location reflects the office to which deposits are reported and may not represent the residence of depositors.
Cities and towns
Transcribed from FDIC BankFind Suite active-location records and the annual Summary of Deposits. County assignment follows the FDIC branch record.