United States Government--trenton, Post Office 402 Main St Trenton, NE 69044 Phone : (308) 334-5265 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Post Office - Trenton 402 Main St Trenton, NE 69044 Phone : (308) 334-5265 Business Category Post Offices Toll-Free           (800) ASK-USPS