All - Architectural style - Greek Revival architecture
| Hudson, Nelson, House |
| Huey, Thomas Walker, House |
| Huffman, William, Cobblestone House |
| Hughes-Clark House |
| Hughes House |
| Hughes Manor |
| Hughes, Thomas H., House |
| Hulburd, Joel H., House |
| Hulburt, Halsey, Homestead |
| Hulburt, Thomas L., House |
| Hull-Hawkins House |
| Hull, Isaac, Store |
| Hull, Patrick, House |
| Hulme, Samuel and Sarah, House |
| Hulmeville Historic District |
| Humboldt Bay Woolen Mill |
| Humphrey, Friend, House |
| Humphrey-Williams House |
| Hunstanton |
| Hunter, John W., House |
| Hunter, Norvall, Farm |
| Hunt House |
| Huntingdon |
| Hunting Lodge Farm |
| Huntington Grange |
| Huntington Inn, Old |
| Huntington Street Baptist Church |
| Huntington Township Hall |
| Huntley |
| Hunt-Moore House |
| Hunt, Roger, Mill |
| Hurlbert, Lewis, Sr., House |
| Hurley Road Historic District |
| Hurst, William E., House |
| Hurt, Joel, House |
| Hustis, John, House |
| Huston House |
| Hutchinson-Blood House |
| Hutchison, Joshua K., House |
| Hyde Chapel |
| Hyde House |
| Iberville Parish Courthouse |
| Iddings-Baldridge House |
| Idler's Retreat |
| Idlewild |
| Idlewild |
| Idlewild |
| Idlewild |
| Iglehart |
| Iles, Elijah, House |
| Independent Congregational Church |
| Indian Hill Avenue Historic District |
| Ingalls House |
| Ingersoll, Cyrus J., House |
| Ingham, William Smith, House |
| Ingleside |
| Inn at Fowlerstown |
| Inness-Fitts House and Studio/Barn |
| Inskeep, P. W., House |
| Institute Hall |
| Inzer House |
| I.O.O.F. Hall |
| Iowa County Courthouse |
| Ironton Lodge Hall |
| Ironwood |
| Irvine United Presbyterian Church |
| Isham, John, House |
| Island Home |
| Isom Place |
| Italy Valley Methodist Church |
| Iverson House |
| Ivy, Adam, House |
| Ivyside Farm |
| Jacks-Manning Farm |
| Jackson-Aitken Farm |
| Jackson Barracks |
| Jackson County Courthouse |
| Jackson Historic District |
| Jackson House |
| Jackson, Jesse, House |
| Jackson, John S., Plantation House and Outbuildings |
| Jackson, Mitchell, Farmhouse |
| Jackson, Samuel and Elbert, House |
| Jackson, Samuel, Jr., House |
| Jacksonville Historic District |
| Jackson Ward Historic District |
| Jacoby Church and Cemetery |
| Jahn, William F., Farmstead |
| James, Charles Worth, House |
| James, Jesse, House |
| Jameson, H.D., House |
| Jameson, James B., House |
| Jamesport Meeting House |
| Jarrell, H. Frank, House |
| Jarville |
| Jarvis House |
| Jefferson County Courthouse |
| Jefferson County Jail |
| Jefferson Historic District |
| Jefferson Playhouse |
Data from United States Park Service and Wikidata
