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Williamsville State Bank and Trust Locations & Branches Williamsville, Illinois
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Williamsville State Bank and Trust operates 3 branches from its headquarters in Williamsville, IL, .
Williamsville State Bank and Trust branch network
All 3 branches are in ILLINOIS, across 3 cities. Its largest office by deposits is the Williamsville State Bank & Trust office in Williamsville, IL, with $35.2M (42.4% of its branch deposits). It had the same number of branches on June 30, 2025.
Williamsville State Bank and Trust at a glance
Its CET1 capital ratio was 40.04% at Q2 2026, comfortably above the 7% level required once the capital conservation buffer is included.
- Total assets, Q2 2026
- $93.8M
- CET1 ratio, Q2 2026
- 40.04%
- Deposit insurance
- FDIC
- Regulator
- FDIC
- Latest call report
- Q2 2026, FFIEC 051
- Established
- 1890
Full financial profile · Is Williamsville State Bank and Trust safe? · Williamsville State Bank and Trust call report · Routing number
Deposit market share
Share of all FDIC-insured deposits held in each area, from the June 30, 2026 Summary of Deposits. Rank 1 is the largest holder. Shares are by bank charter, not by holding company.
| Area | Rank | Deposit share | Deposits |
|---|---|---|---|
| City: Williamsville, IL (1 branch) | 1 of 1 | 100.0% | $35.2M |
| State: IL (3 branches) | 308 of 379 | <0.1% | $83.0M |
Ranked by total assets among banks headquartered in the state: Largest banks in Illinois.
Share by county and metro area
Williamsville State Bank and Trust's share of FDIC-insured deposits in the counties and metro areas where it has branches, from the June 30, 2026 Summary of Deposits. Up to the ten largest of each are shown, by the bank's deposits. Rank 1 is the largest holder. Banks only: credit unions are not in the Summary of Deposits.
Counties
| County | Rank | Deposit share | Deposits | County total |
|---|---|---|---|---|
| Sangamon, IL (1 branch) | 20 of 24 | 0.4% | $35.2M | $9.40B |
Metro areas
| Metro area | Rank | Deposit share | Deposits | Metro total |
|---|---|---|---|---|
| Springfield, IL (1 branch) | 21 of 26 | 0.4% | $35.2M | $9.76B |
| Branch | Location | ZIP | Deposits |
|---|---|---|---|
| Williamsville State Bank & Trust | Williamsville, IL | 62693 | $35.2M |
| Sherman Branch | Sherman, IL | 62684 | $24.5M |
| Old Jacksonville Road Branch | Springfield, IL | 62711 | $23.3M |
Source: FDIC Summary of Deposits, June 30, 2026. How the survey works.
Regulator records: FDIC BankFind (cert 12388) · FFIEC NIC profile (RSSD 365848)