United States Government--post Office 1545 Dewitt St Ellsworth, IA 50075 Phone : (515) 836-4737 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Post Office - Ellsworth 1545 Dewitt St Ellsworth, IA 50075 Phone : (515) 836-4737 Business Category Post Offices Toll-Free           (800) ASK-USPS