Great Southern Bank ← View details 921 Iowa Avenue, Onawa, IA 51040 +1 712-423-1105 greatsouthernbank.com Suggest an Edit Name* State* Locality* ZIP* Street address* Phone* Website Opening hours Monday: 09:00 am — 04:00 pm Tuesday: 09:00 am — 04:00 pm Wednesday: 09:00 am — 04:00 pm Thursday: 09:00 am — 04:00 pm Friday: 07:30 am — 06:00 pm Saturday: 08:00 am — 12:00 pm Your comments * — Required information