U - Haul Co--internal Revenue Service, Jamaica Jamaica, IA 50128 Phone : (641) 429-3232 Business Category Government Offices-Federal Government Offices & Public Schools Post Office - Jamaica 405 Main St Jamaica, IA 50128 Phone : (641) 429-3232 Business Category Post Offices Toll-Free           (800) ASK-USPS U S Government--post Offices, Jamaica Jamaica, IA 50128 Phone : (641) 429-3232 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools