Decker Town Of--post Office Decker, IN 47524 Phone : (812) 769-4512 Business Category Government Offices-City Village & Twp Post Offices Government Offices State & Local Government Offices & Public Schools Post Office - Decker 107 N 3rd St Decker, IN 47524 Phone : (812) 769-4512 Business Category Post Offices Toll-Free           (800) ASK-USPS