Louisiana - Area of significance: Architecture
| Hebert House |
| Heidelberg Hotel |
| Helvetia Dependency |
| Hemenway Furniture Co. Building |
| Hennen Building |
| Hermann-Grima House |
| Hermione |
| Hermitage |
| Hernsheim, Simon, House |
| Hewes House |
| Heyman-Stewart House |
| Hickory Hill Plantation House |
| Hickory Springs Methodist Episcopal Church |
| Highland |
| Highland Historic District |
| Hill, The |
| Hirsch, Mayer, House |
| Hodges Gardens |
| Hodges House |
| Holiday Inn Highrise East |
| Holly Grove |
| Holly Grove Methodist Church |
| Holy Cross Historic District |
| Holy Trinity Catholic Church |
| Homeplace |
| Homeplace Plantation House |
| Homer Historic District |
| Homestead Plantation |
| Homestead Plantation Complex |
| Hope |
| Hope Lodge #145 |
| Hope Plantation House |
| Hope Terrace |
| Hopkins House |
| Houma Elementary School |
| Houmas, The |
| House at 816 Jackson Street |
| Houses at 3014-3038 Leonidas Street |
| Howard Auditorium-Louisiana Tech University |
| Howard Memorial Library |
| Hughes House |
| Humble Oil Camp Historic District |
| Iberville Parish Courthouse |
| Idlewild |
| Ilgenhurst |
| Independence Historic District |
| Irish Channel Area Architectural District |
| Isaacs-Williams Mansion |
| Island Home |
| Istre Cemetery Grave Houses |
| Jackson Barracks |
| Jackson Historic District |
| Jackson House |
| Jackson House |
| Jackson Street Historic District |
| Jacobs, Walter B. |
| Jaenke, F. R., House |
| James, T. L., House |
| Janin Store |
| Jefferson, Joseph, House |
| Jennings Carnegie Public Library |
| Jennings Post Office |
| Joffrion House |
| John Hancock Building |
| Johnson House |
| Jones, Henry, Cottage |
| Jones House |
| Jones House |
| Jones, Jerry, House |
| Jones, John Carroll, House |
| Jones, Wade H., Sr., House |
| Julia Street Row |
| Jung Hotel |
| Kansas City Southern Depot |
| Kateland |
| Katie Plantation House |
| Keachi Baptist Church |
| Keachi Presbyterian Church |
| Keachi Store |
| Keachi United Methodist Church |
| Kean's Apartment Building |
| Keegan House |
| Keegan House |
| Kell House |
| Kenilworth Plantation House |
| Kent Plantation House |
| Kerner House |
| Key-Mize House |
| Kidd-Davis House |
| Killarney |
| Killgore House |
| Kings Highway Christian Church |
| Kirby-Adam House |
| Kirby House |
| Kisatchie School |
| Kleinert Terrace Historic District |
| Kleinpeter House |
| Kleinpeter, John and Amelia Sharp, House |
| Knight Cabin |
| Knox Building |
Data from United States Park Service and Wikidata
