Post Office - Barnes City 610 Spruce St Barnes City, IA 50027 Phone : (641) 644-5212 Post Office - Barnes City Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--post Office Barnes City, IA 50027 Phone : (641) 644-5212 United States Government--post Office Business Category Government Offices-Federal Post Offices Government Offices & Public Schools