Pennsylvania - Criteria: A (event)
| Bell Telephone Company Building |
| Bell Telephone Exchange Building |
| Beltzhoover Elementary School |
| Benjamin Franklin Hotel |
| Bently Hall |
| Bergy Bridge Historic District |
| Berkheimer, Henry and Elizabeth, Farm |
| Berkley Historic District |
| Berwick Armory |
| Berwind-White Mine 40 Historic District |
| Bethel African American Episcopal Church of Monongahela City |
| Bethel A.M.E. Church |
| Bethel Burial Ground |
| Bethlehem Armory |
| Bethlehem Silk Mill |
| Bethlehem Steel Lehigh Plant Mill #2 Annex |
| B.F. Good & Company Leaf Tobacco Warehouse |
| Biberman Building |
| Biery's Port Historic District |
| Big Bend Historical Area |
| Billmeyer, Daniel, House |
| Bindnagles Evangelical Lutheran Church |
| Birchrunville General Store |
| Birchrunville Historic District |
| Bird-in-Hand Hotel |
| Birmingham Friends Meetinghouse and School |
| Birmingham Public School |
| Bishop, John, House |
| Bistline Covered Bridge |
| Bittenbender Covered Bridge |
| Bitzer's Mill Covered Bridge |
| Bixler, Michael and Magdealena Farmstead |
| Black Horse Inn |
| Black Horse Tavern |
| Black Moshannon State Park Day Use District |
| Black Moshannon State Park Family Cabin District |
| Black Moshannon State Park Maintenance District |
| Black, William, Homestead |
| Blairsville Armory |
| Bloomsburg Historic District |
| B'Nai Jacob Synagogue |
| Boalsburg Historic District |
| Board of Education Building |
| Boat House Row |
| Boekel Building |
| Bogert Covered Bridge |
| Boiling Springs Historic District |
| Bok, Edward, Vocational School |
| Bollman, W., and Company Bridge |
| Bomberger's Distillery |
| Bonnet's Tavern |
| Book's Covered Bridge |
| Boonecroft |
| Booth Farm |
| Borneman Mill |
| Borough Hall of the Borough of Waynesboro |
| Bost Building |
| Boston Store |
| Boswell Historic District |
| Bowman Homestead |
| Bowman, Jacob, Tobacco Warehouse |
| Bowmansville Roller Mill |
| Boyce Station |
| Boyer-Mertz Farm |
| Boys' Club of Pittsburgh |
| Bradford Armory |
| Bradford County Courthouse |
| Bradford Downtown Historic District |
| Bradys Bend Iron Company Furnaces |
| Brandywine Battlefield |
| Brandywine Summit Camp Meeting |
| Brashear, John A., House and Factory |
| Brendle Farms |
| Breslyn Apartments |
| Brewerytown Historic District |
| Bridesburg School |
| Bridge 182+42, Northern Central Railway |
| Bridge 5+92, Northern Central Railway |
| Bridge 634, Northern Central Railway |
| Bridge in Heidelberg Township |
| Bridge in Johnstown City |
| Bridge in Portage Township |
| Bridge in Reed Township |
| Bridge Mill Farm |
| Bridgewater Historic District |
| Brier Hill |
| Brimmer, John, Tobacco Warehouse |
| Brinton, Edward, House |
| Brinton's Mill |
| Bristol Historic District |
| Bristol Industrial Historic District |
| Broad Street Historic District |
| Broad Street Market |
| Brobst Mill |
| Brockwayville Passenger Depot, Buffalo, Rochester and Pittsburgh Railroad |
| Brodhead Farm |
| Brookville Historic District |
| Brotherton Farm |
| Brown, Gottlieb, Covered Bridge |
| Brownlee, Scott, Covered Bridge |
Data from United States Park Service and Wikidata
