Post Office - Bayard 300 Main St Bayard, IA 50029 Phone : (712) 651-2323 Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--post Office Bayard, IA 50029 Phone : (712) 651-2323 United States Government--post Office Business Category Government Offices-Federal Post Offices Government Offices & Public Schools