| Business | Phone |
| Bank Midwest 4521 Highway K, O Fallon 63368 | (636) 300-1195 |
| Bank Of America 3029 Highway K, O Fallon 63368 | (636) 978-7202 |
| Bank Of America 311 S Main St, O Fallon 63366 | (636) 240-6216 |
| Bank Of Old Monroe 401 T R Hughes Blvd, O Fallon 63366 | (636) 980-3585 |
| Us Bank 1 Ofallon Sq, O Fallon 63366 | (636) 978-5391 |
| Union Planners Bank 2999 Highway K, O Fallon 63368 | (636) 978-2282 |
| St Johns Bank & Trust Co 2897 Highway K, O Fallon 63368 | (636) 978-7404 |
| Peoples Bank & Trust Co 1310 N Main St, O Fallon 63366 | (636) 980-1777 |
| National City Bank 2017 Highway K, O Fallon 63366 | (636) 978-1800 |
| New Frontier Bank 5000 Winghaven Blvd, O Fallon 63368 | (636) 561-5740 |
| Midwest Bankcentre 2299 Technology Dr, O Fallon 63368 | (636) 447-0533 |
| Mercantile Bank 1 Ofallon Sq, O Fallon 63366 | (314) 425-2000 |
| Jefferson Bank & Trust 4190 Highway K, O Fallon 63368 | (636) 300-0100 |
| First Bank 2979 Highway K, O Fallon 63368 | (636) 379-2856 |
| First National Bank 2996 Highway K, O Fallon 63368 | (636) 736-3050 |
| First State Bank 300 Woodlawn Ave, O Fallon 63366 | (636) 940-5555 |
| Commerce Bank 2913 Highway K, O Fallon 63368 | (636) 949-8470 |
| Commerce Bank 901 Highway K, O Fallon 63366 | (636) 949-8437 |