Post Office - Ellison Bay 12055 Garrett Bay Rd Ellison Bay, WI 54210 Phone : (920) 854-4463 Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government Of--post Offices, Ellison Bay Sister Bay, WI 54234 Phone : (920) 854-4463 Business Category Post Offices Government Offices & Public Schools