United States Government--post Offices, Irma Railway Merrill, WI 54452 Phone : (715) 536-5063 Business Category Post Offices Government Offices & Public Schools Post Office - Irma N6525 Railway St Irma, WI 54442 Phone : (715) 536-5063 Post Office - Irma Business Category Post Offices Toll-Free           (800) ASK-USPS