First Interstate Bank ← View details 40 North 5th Street #1, Custer, SD 57730 +1 605-673-2215 firstinterstatebank.com Suggest an Edit Name* State* Locality* ZIP* Street address* Phone* Website Opening hours Monday: 08:00 am — 05:00 pm Tuesday: 08:00 am — 05:00 pm Wednesday: 08:00 am — 05:00 pm Thursday: 08:00 am — 05:00 pm Friday: 08:00 am — 05:00 pm Saturday: 09:00 am — 12:00 pm Your comments * — Required information