United States Government--post Offices, New Cambria, For Zip Code Information New Cambria, MO 63558 Phone : (660) 226-5690 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Post Office - New Cambria 108 N Main St New Cambria, MO 63558 Phone : (660) 226-5690 Post Office - New Cambria Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Toll-Free           (800) ASK-USPS