United States Government--post Offices, Pleasantville Ofc Thornville, OH 43076 Phone : (740) 246-6155 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools United States Government Thornville, OH 43076 Phone : (740) 246-6155 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Thornville 11 N Main St Thornville, OH 43076 Phone : (740) 246-6155 Post Office - Thornville Business Category Post Offices Toll-Free           (800) ASK-USPS