Post Office - Earlham 125 E 1st St Earlham, IA 50072 Phone : (515) 758-2118 Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--postal Service, Area Post Offices, Earlham 125 E 1st Earlham, IA 50072 Phone : (515) 758-2118 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools