The African American Museum in Philadelphia
American Helicopter Museum and Education Center West Chester (Brandywine Airport near Philadelphia)
The Andy Warhol Museum Pittsburgh
The Arthur Ross Gallery of the University of Pennsylvania Philadelphia
Atwater Kent Museum Philadelphia
The Balch Institute for Ethnic Studies Philadelphia
The Barnes Foundation (Including art gallery.) Merion
The Brandywine River Museum Chadds Ford
Cambria County Historical Society Ebensburg
Carnegie Museum of Art Pittsburgh
Carnegie Museum of Natural History Pittsburgh
Carnegie Science Center Pittsburgh
Chadds Ford Historical Society (Includes two house museums -- the John Chads and Barns-Brinton Houses.) Chadds Ford
Coalport Area Coal Museum Coalport
The Franklin Institute Science Museum Philadelphia
The Frick Art and Historical Center (Includes Clayton -- the restored home of Henry Clay Frick, The Frick Art Museum, The Car and Carriage Museum, and more.) Pittsburgh
Glencairn Museum Bryn AthynGreater Pittsburgh Museum Council (60 museums!)
The Heritage Map Museum Lititz
The Heritage Center Museum of Lancaster County Lancaster
The Houdini Museum Scranton
The Hoyt Institute of Fine Arts New Castle
Independence Seaport Museum Philadelphia
The Jimmy Stewart Museum Indiana
Johnstown Area Heritage Association (Includes the Johnstown Flood Museum, the Johnstown Heritage Discovery Center, and -- opening in the fall of 2001 -- the Wagner-Ritter House/Museum. Johnstown.
Lawrence County Historical Society Museum New Castle
The Mutter Museum & Exhibit Gallery at The College of Physicians of Philadelphia
The National Civil War Museum Harrisburg
National Liberty Museum Philadelphia
National Museum of American Jewish History Philadelphia
The National Watch & Clock Museum Columbia
The New Altoona Railroaders Memorial Museum (and Horseshoe Curve National Historic Landmark) Altoona
Penn-Brad Oil Museum Bradford
Pennsylvania Federation of Museums and Historical Organizations Harrisburg
Pennsylvania Historical and Museum Commission (Site details quite a few museums.)
Pennsylvania Trolley Museum Washington
The Pike County Historical Society Milford
Please Touch Museum Philadelphia
Portage Station Museum Portage
Reading Public Museum Reading
The Temple Judea Museum of Keneseth Israel Elkins Park
The Valley Forge Historical Society Museum Valley Forge
Woodmere Art Museum Philadelphia