Bank of Old Monroe O'Fallon ← View details 401 TR Hughes Boulevard, O'Fallon, MO 63366 +1 636-980-3585 bankofoldmonroe.com Suggest an Edit Name* State* Locality* ZIP* Street address* Phone* Website Opening hours Monday: 08:30 am — 05:00 pm Tuesday: 08:30 am — 05:00 pm Wednesday: 08:30 am — 05:00 pm Thursday: 08:30 am — 05:00 pm Friday: 08:30 am — 06:00 pm Your comments * — Required information