APS buildings are open to staff and invited visitors. The Library is under renovation until early 2022. Virtual programs are ongoing and some in person events are resuming. Read more about the APS's COVID response and operating procedures.

Executive Offices and Museum Gallery
104 South Fifth Street 
Philadelphia, PA 19106-3387
215-440-3400 | Fax 215-440-3450

Library
105 South Fifth Street
Philadelphia, Pa 19106-3386
215-440-3400 | Fax 215-440-3423

For questions about APS Library collections and research visits, please use the APS Library Reference Requests form. To request copies or to learn more about publication permissions from the APS Library, please visit the Reference Requests pageThe Library at the APS is undergoing necessary renovations that make maps, prints, and a significant number of collections, especially from the 20th century onwards, inaccessible to staff. Staff will continue to respond to reference requests and to digitize materials, but will be limited in their ability to access some original materials until the renovations are complete. Completion is expected in early 2022.

Use this form to contact the American Philosophical Society electronically.

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