U S Offices--post Offices, Bladensburg 25941 New Guilford Rd Martinsburg, OH 43037 Phone : (740) 668-3333 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Post Office - Bladensburg 25941 New Guilford Rd Bladensburg, OH 43005 Phone : (740) 668-3333 Post Office - Bladensburg Business Category Post Offices Toll-Free           (800) ASK-USPS