Pennsylvania - Role: Building
| 109-115 Wood Street |
| 1616 Building |
| 1724 Chester Courthouse |
| 1900 Rittenhouse Square Apartments |
| 26th District Police and Patrol Station |
| 32nd St. and Lancaster Ave. Philadelphia Armory |
| Abbeville |
| Abbott, John, House |
| Academy Hall |
| Academy of Music |
| Acheson, Edward G., House |
| Adams, C.F., Building |
| Adams County Courthouse |
| Adamson, William, School |
| Adelphi School |
| Ad-Lin Building |
| Administration Building, Washington and Jefferson College |
| Ag Hill Complex |
| Ajax Metal Company Plant |
| Albion Carpet Mill |
| Albright Memorial Building |
| Alcorn, James, School |
| Alden Park Manor |
| Alden Villa |
| Alfred Newton Richards Medical Research Laboratories and David Goddard Laboratories Buildings |
| Alleghany Mennonite Meetinghouse |
| Allegheny Baptist Church |
| Allegheny County Courthouse and Jail |
| Allegheny High School |
| Allegheny Observatory |
| Allegheny Post Office |
| Allen, Ethan, School |
| Allentown Masonic Temple |
| Allentown National Bank |
| Allerdice, Taylor, High School |
| Allerman, Conrad and Margaret, House |
| Allgates |
| Allison, William, House |
| Altoona Armory |
| Aluminum Research Laboratories |
| Amalgamated Center |
| American Baptist Publication Society |
| American/Consolidated Tobacco Companies |
| American Philosophical Society Hall |
| American Railway Express Company Garage |
| Americus Hotel |
| Andalusia |
| Anderson, Marian, House |
| Andrews, H. O., Feed Mill |
| Anglecot, The |
| Angle Farm |
| Anoatok |
| Antes, Henry, House |
| Anthracite Bank Building |
| Arch Street Friends Meeting House |
| Arch Street Opera House |
| Arch Street Presbyterian Church |
| Armstrong Cork Company |
| Armstrong County Courthouse and Jail |
| Arndt, Jacob, House and Barn |
| Arsenal Junior High School |
| Ashbridge, David, Log House |
| Ashley and Bailey Company Silk Mill |
| Ashley and Bailey Silk Mill |
| Ashton-Hursh House |
| Athenaeum of Philadelphia |
| Atkinson, Clement, Memorial Hospital |
| Audenried, Charles Y., Junior High School |
| Augustus Lutheran Church |
| August, Wendell, Forge |
| Autun |
| Axe, William W., School |
| Ayres, Bucher, Farm |
| Ayres, John, House |
| Bache, Alexander Dallas, School |
| Bachman and Forry Tobacco Warehouse |
| Bahr Mill Complex |
| Bailey, John, Farm |
| Baily Farm |
| Baird, Matthew, Mansion |
| Bair, Oliver, H., Funeral Home |
| Baker Mansion |
| Baldwin-Reynolds House |
| Bank of Chester County |
| Baptist Institute for Christian Workers |
| Barclay House |
| Barclay House |
| Barley Sheaf Inn |
| Barnard, William J., Residence |
| Barns-Brinton House |
| Barrett, Rufus, Stone House |
| Bartlett School |
| Barton, Clara, School |
| Bartram, John, High School |
| Bartram, John, House |
| Basch & Fisher Tobacco Warehouse |
| Bauern Freund Print Shop |
| Bausman Farmstead |
| Baxter High School |
| Bayard School |
Data from United States Park Service and Wikidata
