William Penn Annex Post Office

Post office

900 Market Street, Philadelphia, PA 19107

Hours are not published. Call before you go.

Hours and addresses come from the State Department listing, updated November 2, 2026.

Book at USPS Directions Facilities in Philadelphia Facilities in Pennsylvania

William Penn Annex Post Office accepts new U.S. passport applications in person in Philadelphia, PA. First-time and child visits are booked on the USPS scheduler. Search ZIP 19107. How to apply · How to renew

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