First Interstate Bank, Morristown, SD Instalment Loans Business Loan Personal Loans Car Title Loans Online Loans Morristown, SD 302 Main Street. ZIP Code: 57645 (605) 524-3611 South Dakota, Morristown, Instalment Loans About First Interstate Bank Opening Hours Monday 8:30 AM – 3:30 PM Tuesday 8:30 AM – 3:30 PM Wednesday 8:30 AM – 3:30 PM Thursday 8:30 AM – 3:30 PM Friday 8:30 AM – 3:30 PM Saturday Closed Sunday Closed First Interstate Bank on the map Show on Google Map