Pennsylvania - Criteria: C (architecture/engineering)
| Hewitt Covered Bridge |
| Heywood Chair Factory |
| Hibernia House |
| High Bridge |
| High German Evangelical Reformed Church |
| High Hill Farm |
| Highland Building |
| Highland Hall |
| Highland Park Residential Historic District |
| Highlands, The |
| Highland Towers Apartments |
| Highspire High School |
| 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 |
| Hogback Bridge |
| Hogue, Robert M., House |
| Holicong Village Historic District |
| Hollidaysburg Historic District |
| Hollingshead Covered Bridge No. 40 |
| Holman, A. J., and Company |
| Holme Avenue Bridge |
| Holmes-Foster-Highlands Historic District |
| Homestead High-Level Bridge |
| Homestead Historic District |
| Homestead Pennsylvania Railroad Station |
| Honesdale Residential Historic District |
| Hood Octagonal School |
| Hoopes, Cyrus, House and Barn |
| Hope Lodge |
| Hopewell Farm |
| Hopewell Historic District |
| Hopkinson, Francis, School |
| Hopper-Snyder Homestead |
| Hopwood-Miller Tavern |
| Hornby School |
| Horner House and Barn |
| Horn, George L., School |
| Horseshoe Curve |
| Horse Valley Bridge |
| Horsham Friends Meeting |
| Horsham-Montgomery Bridge |
| 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 2501-2531 Charles Street |
| Houses at 838-862 Brightridge Street |
| Houston, Henry H., School |
| Howard Tunnel, Northern Central Railway |
| Howe, Julia Ward, School |
| Howell House |
| Hower-Slote House |
| Huffman Distillery and Chopping Mill |
| Hughes House |
| Hulmeville Historic District |
| 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 |
| Indian God Rock Petroglyphs Site (36VE26) |
| Institute for Colored Youth |
| Integrity Title Insurance, Trust and Safe Deposit Company |
| Irish, Nathaniel, House |
| Ironstone Bridge |
| Irvine, Guy C., House |
| Irvine United Presbyterian Church |
| Irvin-Patchin House |
| 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 |
Data from United States Park Service and Wikidata
