Post Office - Parker 208 Washington St Parker, PA 16049 Phone : (724) 399-2449 Business Category Post Offices Toll-Free           (800) ASK-USPS United States Government--postal Service, Parker Ofc Parker, PA 16049 Phone : (724) 399-2449 Business Category Government Offices-Federal Government Offices & Public Schools U.s. Government--u.s. Postal Service, Parker Ofc Parker, PA 16049 Phone : (724) 399-2449 Business Category Government Offices-Federal Government Offices & Public Schools