Post Office - Delphi Falls 2185 Oran Delphi Rd Delphi Falls, NY 13051 Phone : (315) 662-7428 Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--post Offices, Delphi Falls New Woodstock, NY 13122 Phone : (315) 662-7428 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools