Pennsylvania - Area of significance: Architecture
| High Street Historic District |
| Hill House |
| Hill, John, House |
| Hill-Physick House |
| Hill's Tavern |
| Hockley Mill Farm |
| Hockley Row |
| Hoene-Werle House |
| Hoffman, George, House |
| Hogue, Robert M., House |
| Holicong Village Historic District |
| Hollidaysburg Historic District |
| Holman, A. J., and Company |
| Holmes-Foster-Highlands Historic District |
| Homestead Historic District |
| Homestead Pennsylvania Railroad Station |
| Honesdale Residential Historic District |
| Hood Octagonal School |
| Hoopes, Cyrus, House and Barn |
| Hope Lodge |
| Hopewell Farm |
| Hopewell Furnace National Historic Site |
| Hopewell Historic District |
| Hopkinson, Francis, School |
| Hopper-Snyder Homestead |
| Hopwood-Miller Tavern |
| Hornby School |
| Horner House and Barn |
| Horn, George L., School |
| Horsham Friends Meeting |
| Hotel Abraham Lincoln |
| Hotel Fauchere and Annex |
| Hotel Sterling |
| Hottenstein Mansion |
| Hough, John and Phineas, House |
| House at 200 West North Avenue |
| House at Springdell |
| 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 |
| Howe, Julia Ward, School |
| Howell House |
| Hower-Slote House |
| Huffman Distillery and Chopping Mill |
| Hughes House |
| Hulmeville Historic District |
| Humane Fire Engine Company No. 1 |
| Hunsberger, Isaac, House |
| Hunt Armory |
| Hunter's Mill Complex |
| Hunterstown Historic District |
| Huntingdon Armory |
| Huntingdon Borough Historic District |
| Huntingdon Furnace |
| Huston, Abram, House and Carriage House |
| Hutchinson Farm |
| Iddings-Baldridge House |
| Idlewild |
| Idlewild Farm Complex |
| Illick's Mill |
| Independence National Historical Park |
| Independent Congregational Church |
| Indiana Armory |
| Indiana Borough 1912 Municipal Building |
| Indian Deep Farm |
| Institute for Colored Youth |
| 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 |
| Irvin-Patchin House |
| Irwinton Historic District |
| Isett, Jacob, House and Store |
| Ivy Cottage |
| Ivyland Historic District |
| Ivy Lodge |
| Ivy Mills Historic District |
| Jackson Mansion and Carriage House |
| Jacksons Mill Covered Bridge |
| Jacobs, Benjamin, House |
| Jacobsburg Historic District |
| James-Lorah House |
| James, Morgan, Homestead |
| Jayne, Horace, House |
| Jefferson. John P., House |
| Jefferson Land Association Historic District |
| Jefferson Theater |
| Jefferson, Thomas, School |
| Jenkins Homestead |
| Jenks, John Story, School |
| Jennings-Gallagher House |
| Jersey Shore Historic District |
| Johnsonburg Commercial Historic District |
Data from United States Park Service and Wikidata
