Post Office - Ashton 152 1st Ave Ashton, IA 51232 Phone : (712) 724-6241 Post Office - Ashton Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--social Security Admin, Post Ofc 3012 3rd St Ashton, IA 51232 Phone : (712) 724-6241 Business Category Government Offices-Federal Administration Of Social Human Resource & Income Maintenance Programs Government Offices & Public Schools