Union Pacific Railroad--post Offices, Augusta Augusta, MO 63332 Phone : (636) 228-4888 Business Category Railroads Line-Haul Operating Post Offices Railroads Post Office - Augusta 237 Ferry St Augusta, MO 63332 Phone : (636) 228-4888 Business Category Post Offices National Security Recruiting Us Armed Forces Toll-Free           (800) ASK-USPS United States Government--u.s. Postal Service, Augusta Augusta, MO 63332 Phone : (636) 228-4888 United States Government--u.s. Postal Service, Augusta Business Category Government Offices-Federal National Security Recruiting Us Armed Forces Government Offices & Public Schools