FDIC-insured bank
Bank of O'Fallon
Bank headquartered in O'Fallon, Illinois, part of SECURITY FIRST BANCSHARES INC.
Source: FDIC BankFind Suite, data as of June 30, 2026, fetched September 5, 2026
Headquarters and contact
| Address | 901 S Lincoln Ave O'Fallon, IL 62269 |
| County | St. Clair |
| Metro area | St. Louis, MO-IL |
| Website | www.bankofallon.com |
| Phone | not published in FDIC data, see the bank's website |
FDIC record
| FDIC Certificate | 18171 |
| Federal Reserve RSSD ID | 410748 |
| Status | Active |
| Charter class | NM (STATE) |
| Holding company | SECURITY FIRST BANCSHARES INC |
| Domestic offices | 2 |
| Financials as of | June 30, 2026 |
Routing number
FDIC does not publish ABA routing numbers, and many banks use different routing numbers by state or by account type. The reliable places to find yours: the bottom left of a check from this bank, the "account details" screen in its online banking, or its official website at www.bankofallon.com.
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Offices nearest to headquarters
| Bank Of O'Fallon main office O'Fallon, IL |
901 S Lincoln Ave, 62269 |
| Drive-In Facility Branch O'Fallon, IL |
901 S Lincoln Ave, 62269 |