Florida - Criteria: C (architecture/engineering)
| Jackson, Dr. James M., Office |
| Jacksonville, Pensacola and Mobile Railroad Company Freight Depot |
| Jacksonville Terminal Complex |
| Jefferson County Jail |
| Jeffries, Capt. Howard B., House |
| Jenks, Holland, House |
| Jennings High School |
| Jennings, William Sherman, House |
| Jewett-Thompson House |
| John Nolen Plan of Venice Historic District |
| Johns House |
| Johnson Chapel Missionary Baptist Church |
| Johnson, C. L., House |
| Johnson, Louis, Building |
| Johnson-Schoolcrafy Building |
| Johnson-Smith House |
| Johnson-Wolff House |
| Jordan-Beggs House |
| Josselyn, James Riley, House |
| J & S Building |
| Kampong |
| Kanapaha |
| Keewaydin Club |
| Keith Cabin |
| Keith, Edson, Estate |
| Kelsey City City Hall |
| Kenilworth Lodge |
| Kennedy, Dr. Walter, House |
| Kentucky Home |
| Kenwood Historic District |
| Kerr City Historic District |
| Key West Historic District |
| Kilkoff House |
| King, Dr. Willard Van Orsdel, House |
| King-Hooton House |
| King, John A., House |
| Kingsley Plantation |
| King Trunk Factory and Showroom |
| Kissimmee Historic District |
| Klutho, Henry John, House |
| Knight, W.A., Building |
| Knowles Memorial Chapel |
| Koreshan Unity Settlement Historic District |
| Kress, S.H., and Co. Building |
| Kress, S.H., and Co. Building |
| Kress, S.H., and Company Building |
| Kress, S.H., Building |
| Lafayette Street Bridge |
| La Grange Church and Cemetery |
| Lake Adair-Lake Concord Historic District |
| Lake City Historic Commercial District |
| Lake County Courthouse |
| Lake Eola Heights Historic District |
| Lake Helen Historic District |
| Lake Ivanhoe Historic Residential District |
| Lakeland High School, Old |
| Lake Lillian Neighborhood Historic District |
| Lake Mary Chamber of Commerce Building |
| Lake Mirror Promenade |
| Lakeside Inn |
| Lake Wales City Hall |
| Lake Wales Commercial Historic District |
| Lake Wales Historic Residental District |
| Lake Worth City Hall, Old |
| Lamb, A.M., House |
| Lane-Towers House |
| Larimer Memorial Library |
| Laroe Family Homestead Historic District |
| Latimer Cabin |
| Laughlin, James, House |
| Launch Complex 39 |
| Launch Complex 39-Pad A |
| Launch Complex 39-Pad B |
| Launch Control Center |
| Laurel Park Historic District |
| Lavalle House |
| Lavender House |
| LeClaire Apartments |
| Lee County Courthouse |
| Leiman House |
| Leon County Health Unit Building |
| Leon High School |
| Levillain-Letton House |
| Lewis House |
| Lewis Mausoleum |
| Lewis, W. Henry, House |
| Liberty Hill Schoolhouse |
| Library East |
| Lichgate on High Road |
| Lincoln Road Mall |
| Lincolnville Historic District |
| Lindeman-Johnson House |
| Lindsley, Halstead and Emily, House |
| Lindsley House |
| Lippincott Mansion |
| Little Theatre |
| Little White House |
| Llambias House |
| Lloyd Historic District |
| Lloyd Railroad Depot |
Data from United States Park Service and Wikidata
