- Air Heritage Museum
- Allegheny Foothills Historical Society
- Allegheny Portage Railroad Historical Site
- Allegheny-Kiski Valley Heritage Museum
- Baker Mansion History Museum
- Battle of Homestead Foundation
- Beaver Area Heritage Museum
- Beaver County Historical Research & Landmarks Foundation
- Beaver County Industrial Museum
- Big Mac Museum Restaurant
- Braddock Road Preservation Association
- Braddock's Battlefield History Center
- Brownsville Area Revitalization Corporation
- Bushy Run Battlefield
- Butler County Historical Society
- Carnegie Museums of Pittsburgh
- Carnegie Science Center
- Clarion County Historical Society
- Compass Inn Museum & Ligonier Valley Historical Society
- David Bradford House
- David Espy House
- Depreciation Lands Museum
- Donora Historical Society and Smog Museum
- Elizabeth Township Historical Society
- Fallingwater
- Fayette County Historical Museum
- Flight 93 Memorial
- Fort Bedford Museum
- Fort Edwards
- Fort Ligonier
- Fort Necessity
- Fort Pitt Blockhouse
- Fort Pitt Museum
- Frick House (Clayton)
- Gallatin House at Friendship Hill
- Gallitzin Tunnels Park & Museum
- Greenville Historical Society
- Harmony Museum
- Hartwood Acres Park Mansion
- Heinz History Center
- Jean Bonnet Tavern
- Jimmy Stewart Museum
- Johnstown Flood Museum
- Johnstown Flood National Memorial
- Kentuck Knob
- Kerr Memorial Museum
- Leechburg Area Museum and Historical Society
- LeMoyne House
- Lincoln Highway Heritage Corridor
- McKeesport History and Heritage Center
- Meadowcroft Rockshelter and Historic Village
- Mercer County Historical Society
- Miniature Railroad & Village at Carnegie Science Center
- Old Allegheny County Jail Museum
- Old Bedford Village
- Old Economy Village
- Pennsylvania Trolley Museum
- Point State Park
- Rachel Carson Homestead
- Rivers of Steel National Heritage Area
- Sewickley Heights History Center
- Smock Historical Society
- Southern Alleghenies Museum of Art
- Springs Historical Society
- Tour-Ed Mine
- USS Requin Submarine at Carnegie Science Center
- Washington County Historical Society
- West Overton Village
- Western Pennsylvania Model Railroad Museum
- Westmoreland County Historical Society
- Windber Coal Heritage Center
- Woodville Plantation
- Woodville Plantation (Neville House)
- Zelionople Historical Society
