Philadelphia City Hall Location 1 S. Penn SquarePhiladelphiaPennsylvania19102 Next Event Major Octavius V. Catto Honor Ceremony - October 5, 2024 - 11:00 am Loading Map.... Philadelphia City Hall1 S. Penn Square - PhiladelphiaEvents 39.951202 -75.163471 Upcoming Events Major Octavius V. Catto Honor Ceremony - October 5, 2024 - 11:00 am