NorthStar Credit Union ← View details 12251 Illinois 59, Plainfield, IL 60585 +1 800-232-6828 oaktrust.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 — 05:30 pm Saturday: 08:30 am — 12:30 pm Your comments * — Required information