United States Government Continued--post Offices Continued, Zionsville Emmaus, PA 18049 Phone : (610) 967-1134 Business Category Government Offices-Federal Post Offices Government Offices & Public Schools Post Office - Zionsville 6680 Kings Hwy S Zionsville, PA 18092 Phone : (610) 967-1134 Business Category Post Offices Toll-Free           (800) ASK-USPS