Pennsylvania - Area of significance: Industry
| Ajax Metal Company Plant |
| Albion Carpet Mill |
| Allegheny Furnace |
| Allegheny Second Ward Industrial Historic District |
| Allegheny West Historic District |
| Alliance Furnace |
| Aluminum Research Laboratories |
| American/Consolidated Tobacco Companies |
| Andrews, H. O., Feed Mill |
| Armstrong Cork Company |
| Ashley and Bailey Company Silk Mill |
| Ashley and Bailey Silk Mill |
| August, Wendell, Forge |
| Bahr Mill Complex |
| Baird, Matthew, Mansion |
| Bangor Historic District |
| Barree Forge and Furnace |
| Basch & Fisher Tobacco Warehouse |
| Bear Creek Village Historic District |
| Beatty's Mills Factory Building |
| Bellefonte Forge House |
| Bellefonte Historic District |
| Bellevue Worsted Mills |
| Bergdoll, Louis, House |
| Berger, John & Son, Company Tobacco Warehouse |
| Berwind-White Mine 40 Historic District |
| Bethlehem Silk Mill |
| Bethlehem Steel Lehigh Plant Mill #2 Annex |
| B.F. Good & Company Leaf Tobacco Warehouse |
| Biery's Port Historic District |
| Big Bend Historical Area |
| Bindley Hardware Company Building |
| Bloomsburg Historic District |
| Blumenthal Brothers Chocolate Factory |
| Boekel Building |
| Boiling Springs Historic District |
| Bomberger's Distillery |
| Borneman Mill |
| Boswell Historic District |
| Bowman, Jacob, Tobacco Warehouse |
| Bowmansville Roller Mill |
| Boyertown Burial Casket Company |
| Bradford Downtown Historic District |
| Bradys Bend Iron Company Furnaces |
| Brashear, John A., House and Factory |
| Brendle Farms |
| Brewerytown Historic District |
| Breyer, Henry W., Sr., House |
| Brier Hill |
| Brimmer, John, Tobacco Warehouse |
| Brinton, Edward, House |
| Bristol Industrial Historic District |
| Brobst Mill |
| Brockerhoff Mill |
| Brookville Historic District |
| Brotherton Farm |
| Brownhill and Kramer Hosiery Mill |
| Brown-Moore Blacksmith Shop |
| Brown's, George, Sons Cotton and Woolen Mill |
| Buchanan Furnace |
| Budd, Edward G., Manufacturing Company |
| Buick Motor Company Building |
| Burk Brothers and Company |
| Burns, Jeremiah, Farm |
| Butterworth, H.W. and Sons Company Building |
| Cairnbrook Historic District |
| Cairnwood |
| Callowhill Industrial Historic District |
| Cambria City Historic District |
| Cambria Iron Company |
| Carbon County Jail |
| Carrick Furnace |
| Catasauqua Residential Historic District |
| Cement City Historic District |
| Central Bethlehem Historic District |
| Central Norristown Historic District |
| Centre Furnace Mansion House |
| Centre Mills |
| Chanticleer |
| Charlestown Village Historic District |
| Chester Creek Historic District |
| Chickies Historic District |
| Cintra |
| City Park Brewery |
| Class and Nachod Brewery |
| Clinger-Moses Mill Complex |
| Codorus Forge and Furnace Historic District |
| Coffeetown Grist Mill |
| Cold Point Historic District |
| Colerain Forges Mansion |
| College Hill Residential Historic District |
| Colonial Germantown Historic District |
| Columbia Wagon Works |
| Colver Historic District |
| Commodore Historic District |
| Conestoga Cork Works Building |
| Consolidated Ice Company Factory No. 2 |
| Consumers Cigar Box Company |
| Continental Stove Works |
| Cook, Anthony Wayne, Mansion |
Data from United States Park Service and Wikidata
