Pennsylvania - Constructed - 1900–1909
| Academia Pomeroy Covered Bridge |
| Adams Avenue Bridge in Philadelphia |
| Ajax Metal Company Plant |
| Allegheny Observatory |
| Allentown National Bank |
| Amalgamated Center |
| Austin Dam |
| Bache, Alexander Dallas, School |
| Baxter High School |
| Beechwood Elementary School |
| Bellevue Stratford Hotel |
| Brownhill and Kramer Hosiery Mill |
| Clark, Sen. Joseph O., House |
| Colonial National Bank Building |
| Connellsville Armory |
| Consolidated Ice Company Factory No. 2 |
| Cotton and Maple Streets School |
| Dimeling Hotel |
| Dropsie University Complex |
| Durham, Thomas, School |
| Eden Cemetery |
| Erie Masonic Temple |
| Farmers and Mechanics Trust Company Building |
| Frick Building and Annex |
| Gallatin School |
| Germantown Junction Station |
| Goodman Brothers and Hinlein Company |
| Grey, Zane, House (Boundary Increase) |
| Hazeltine, A. J., House |
| Hazelwood Brewing Company |
| Hess, A. B., Cigar Factory, and Warehouses |
| Hunter Saw & Machine Company |
| Lorraine Apartments |
| McCleary Elementary School |
| Mercer Museum |
| Miller, David H., Tobacco Warehouse |
| Mishler Theatre |
| Most Precious Blood Roman Catholic Church, Rectory and Parochial School |
| Oakmont Country Club Historic District |
| Perry High School |
| Philadelphia City Hall |
| Pittsburgh Athletic Association Building |
| Pittsburgh Brass Manufacturing Company Building |
| Plaza Apartments |
| Reading Railroad Station |
| Rodef Shalom Temple |
| Rotunda of the Pennsylvania Railroad Station |
| State Capitol Building, Pennsylvania |
| St. Gabriel's Catholic Parish Complex |
| St. Gertrude Roman Catholic Church |
| U.S. Post Office |
| US Post Office-Charleroi |
| Vare, Abigail, School |
| Vigilant Fire Company Firemen's Monument |
| Walton, Asa, House |
| Woodcrest |
Data from United States Park Service and Wikidata
