Banks in St. Clair County, Illinois
68 active bank branches operated by 26 institutions, per FDIC records.
Active branches
68
Banks present
26
Deposits (2025)
$5.8B
Closings since 2020
17
4 openings
Largest banks by deposits in St. Clair County (2025)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| Regions Bank | $848M | 14.6% | 12 |
| Associated Bank | $469M | 8.1% | 3 |
| Carrollton Bank | $448M | 7.7% | 1 |
| Busey Bank | $437M | 7.5% | 3 |
| Bank of America | $422M | 7.2% | 2 |
| Citizens Community Bank | $418M | 7.2% | 4 |
| FCB Banks | $368M | 6.3% | 4 |
| Bank of Belleville | $352M | 6% | 1 |
| Bank of O'Fallon | $320M | 5.5% | 2 |
| First National Bank of Waterloo | $277M | 4.7% | 8 |
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.