New York - Area of significance: Architecture
| Land of Clover |
| Land Office |
| Landon, Samuel, House |
| Landsberg, William, House |
| Lane Cottage |
| Langdon Estate Gatehouse |
| Lanier, James F. D., Residence |
| Lansingburgh Academy |
| Lansing, John V. A., Farmhouse and Billsen Cemetery and Archeological Site |
| Lansing Manor House |
| Lapham, Ambrose S., House |
| Laraway, John and Martinus, Inn |
| Larchmont Avenue Church |
| Larom Cottage |
| Larom-Welles Cottage |
| Larrowe House |
| Larzelere Tavern |
| Lasell Hall |
| Lasher-Davis House |
| Lasher, George, House |
| Latimer Reef Light Station |
| LaTourette House |
| Lattin-Crandall Octagon Barn |
| Lattingtown Baptist Church |
| Laurel and Michigan Avenues Row |
| Lawrence Memorial Chapel and Cemetery |
| Lawrence Park Historic District |
| Lawton, George H., House |
| Lawyer, Johannes Jr., House |
| Lawyers Cooperative Publishing Company Complex |
| Lay, Hiram, Cobblestone Farmhouse |
| Layman, Frank D., Memorial |
| Leander McCord Houses Historic District |
| Leavenworth Apartments |
| Lebanon Springs Union Free School |
| LeDoux/Healey House |
| Leech-Lloyd Farmhouse and Barn Complex |
| Leech-Parker Farmhouse |
| Leeds Dutch Reformed Church |
| Lee, Higginson & Company Bank Building |
| Lee School |
| Leetch, Dr. Henry, House |
| LeFevre, Abraham and Maria, House |
| Lefferts-Laidlaw House |
| Lefferts Manor Historic District |
| Leffingwell-Batcheller House |
| LeGrange Farmstead |
| Lehigh Valley Railroad Barge 79 |
| Lehigh Valley Railroad Depot |
| Lehigh Valley Railroad Station |
| Lehman, John, House |
| Leis Block |
| Leis Cottage |
| Leland Castle |
| Lenox District No. 4 Schoolhouse |
| Lent Cottage |
| Lent Homestead and Cemetery |
| Leon Grange No. 795 |
| Leon United Methodist Church |
| Leopold Street Shule |
| LeRay Hotel |
| LeRay Mansion |
| LeRay, Vincent, House |
| LeRoy, Daniel, House |
| Le Roy Historic District |
| LeRoy House and Union Free School |
| Lescaze House |
| Letchworth State Park |
| LETTIE G. HOWARD (schooner) |
| Level Club |
| Lever House |
| Levitz Family Farm |
| Levor, Gustav, House |
| Lewis Avenue Congregational Church |
| Lewis County Fairgrounds |
| Lewis, Harry and Molly, House |
| Lewis House |
| Lexington House |
| Leyden Common School No. 2 |
| Liberty Downtown Historic District |
| Liberty Street Historic District |
| Liberty Tower |
| Liberty Village Historic District |
| Library Bureau-Remington Rand-Sperry UNIVAC Manufacturing Complex |
| Library Park Historic District |
| Liddle, Alexander, Farmhouse |
| Liddle, Robert, Farmhouse |
| Liddle, Thomas, Farm Complex |
| Liebler-Rohl Gasoline Station |
| Life Savers Building |
| Lighthouse |
| Ligonier Point Historic District |
| Lil's Diner |
| Lily Dale Assembly Historic District |
| Lima Village Historic District |
| Lincoln, Anselm, House |
| Lincoln Building |
| Lincoln Club |
| Lincoln School |
| Linden-South Historic District |
Data from United States Park Service and Wikidata
