Banks in Williamson County, Illinois
FDIC-insured institutions in Williamson County held $1.9 billion in deposits as of June 30, 2026, according to the FDIC.
14 FDIC-insured institutions held $1.9 billion in deposits in 41 offices in Williamson County at June 30, 2026; Banterra Bank held the most, 25.8% of the county's.
Williamson County, June 30, 2026
- $1.9 billion
- Deposits in the county
- $1,903,159,000
- At June 30, 2026, against $2.0 billion a year before, each year's own dollars.
- 14
- Institutions with deposits
- FDIC-insured banks and savings institutions with an office here that reported deposits.
- 41
- Offices
- Every office the survey lists here, against 42 in 2025.
- 25.8%
- The largest share
- Banterra Bank, with $490.7 million in 9 offices.
Each institution’s share of the county’s deposits
3 more columns on a wider screen
| Institution | Deposits | Share |
|---|---|---|
| Banterra Bank | $490.7 million | 25.8% |
| First Southern Bank | $330.1 million | 17.3% |
| The Bank of Herrin | $326.5 million | 17.2% |
| Farmers State Bank of Alto Pass, Ill. | $130.1 million | 6.8% |
| Peoples National Bank , N.A. | $115.9 million | 6.1% |
| U.S. Bank National Association | $111.2 million | 5.8% |
| Fifth Third Bank, National Association | $94.2 million | 4.9% |
| SouthernTrust Bank | $76.0 million | 4.0% |
| First Mid Bank & Trust, National Association | $69.7 million | 3.7% |
| Regions Bank | $65.7 million | 3.5% |
| Legence Bank | $58.7 million | 3.1% |
| Southern Illinois Bank | $26.1 million | 1.4% |
| Woodforest National Bank | $5.4 million | 0.3% |
| Murphy-Wall State Bank and Trust Company | $2.8 million | 0.1% |
An institution with no office in the county in 2025 shows none for that year; a name is the survey’s for 2026, and one without a link has no page because it did not file a Call Report for the newest quarter.
Sources
- FDIC Summary of Deposits — every office's deposits at June 30, 1994 to the newest survey — Federal Deposit Insurance Corporation · Public domain — U.S. Government work · retrieved September 27, 2026
Compiled automatically from FDIC Summary of Deposits — every office's deposits at June 30, 1994 to the newest survey by a checked SQL query · Editor: Kian O'Connor · How this site is built
Data retrieved