Passport Application Services - Plymouth 302 E Main St Plymouth, WI 53073 Phone : (920) 892-8859 Business Category Passport Application Services Toll-Free           (800) ASK-USPS Post Office - Plymouth 302 E Main St Plymouth, WI 53073 Phone : (920) 892-8859 Business Category Post Offices Toll-Free           (800) ASK-USPS