Banks in Williamson County, Illinois
42 active bank branches operated by 14 institutions, per FDIC records.
Active branches
42
Banks present
14
Deposits (2025)
$1.9B
Closings since 2020
3
2 openings
Largest banks by deposits in Williamson County (2025)
| Bank | Deposits | Share | Branches |
|---|---|---|---|
| Banterra Bank | $561M | 28.9% | 10 |
| The Bank of Herrin | $325M | 16.7% | 5 |
| First Southern Bank | $323M | 16.6% | 9 |
| Farmers State Bank of Alto Pass, Ill. | $136M | 7% | 3 |
| Peoples National Bank | $120M | 6.2% | 3 |
| U.S. Bank | $107M | 5.5% | 1 |
| Fifth Third Bank | $72M | 3.7% | 1 |
| SouthernTrust Bank | $70M | 3.6% | 1 |
| Regions Bank | $67M | 3.4% | 1 |
| First Mid Bank & Trust | $67M | 3.4% | 2 |
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.