Pennsylvania - Role: Building
| Hopkinson, Francis, School |
| Hopper-Snyder Homestead |
| Hopwood-Miller Tavern |
| Hornby School |
| Horner House and Barn |
| Horn, George L., School |
| Horsham Friends Meeting |
| Hosanna Church and Cemetery |
| Hotel Abraham Lincoln |
| Hotel Fauchere and Annex |
| Hotel Lykens |
| Hotel Pennsylvania |
| Hotel Sterling |
| Hottenstein Mansion |
| Hough, John and Phineas, House |
| House at 200 West North Avenue |
| House at Springdell |
| House at Upper Laurel Iron Works |
| Houseknecht Farm |
| House of Miller at Millbach |
| Houses at 1907-1951 N. 32nd St. |
| Houses at 2000-2018 Delancey Street |
| Houses at 2501-2531 Charles Street |
| Houses at 838-862 Brightridge Street |
| Houston, Henry H., School |
| Hovenden House, Barn and Abolition Hall |
| Howe, Julia Ward, School |
| Howell and Brothers Paper Hangings Manufactory |
| Howell House |
| Hower-Slote House |
| Hoyle, Harrison & Kaye Textile Mill |
| Hudson Grist Mill |
| Huffman Distillery and Chopping Mill |
| Hughes House |
| Humane Fire Engine Company No. 1 |
| Hunsberger, Isaac, House |
| Hunt Armory |
| Hunter Saw & Machine Company |
| Hunter's Mill Complex |
| Huntingdon Armory |
| Hunt, Roger, Mill |
| Huston, Abram, House and Carriage House |
| Iddings-Baldridge House |
| Idlewild |
| Idlewild Farm Complex |
| Illick's Mill |
| Independent Congregational Church |
| Indiana Armory |
| Indiana Borough 1912 Municipal Building |
| Indian Deep Farm |
| Indian Steps Cabin |
| Institute for Colored Youth |
| Institute of the Pennsylvania Hospital |
| Insurance Company of North America Building |
| Integrity Title Insurance, Trust and Safe Deposit Company |
| International Harvester Company Building-Philadelphia Branch House |
| International Harvester Company of America: Pittsburgh Branch House |
| Interstate Storage Warehouse |
| Irish, Nathaniel, House |
| Irish-Townsend House |
| Irvine, Guy C., House |
| Irvine United Presbyterian Church |
| Irving Female College |
| Irvin-Patchin House |
| Irwinton Historic District |
| Isett, Jacob, House and Store |
| Israel Building |
| Ivy Cottage |
| Ivy Lodge |
| Jackson Mansion and Carriage House |
| Jacobs, Benjamin, House |
| James-Lorah House |
| James, Morgan, Homestead |
| Jayne, Horace, House |
| Jefferson Avenue School |
| Jefferson Elementary School |
| Jefferson. John P., House |
| Jefferson Theater |
| Jefferson, Thomas, School |
| Jenkins Homestead |
| Jenkins' Town Lyceum Building |
| Jenkintown Wyncote Train Station |
| Jenks, John Story, School |
| Jennings-Gallagher House |
| Johnson-Hatfield Tavern |
| Johnson, John, House |
| Johnson, Nicholas, Mill |
| Johnston's Tavern |
| Jones and Laughlin Steel Company Building |
| Jones, Benjamin F., Cottage |
| Jones, B. F., Memorial Library |
| Jones, James, House |
| Jones, John Paul, Junior High School |
| Juniata Woolen Mill and Newry Manor |
| Juvenile and Domestic Branches of the Municipal Court |
| Kagerise Store and House |
| Kahn, Harry C. and Son, Warehouse |
| Kane Armory |
| Kane, Thomas L., Memorial Chapel |
| Karolcik Building |
Data from United States Park Service and Wikidata
