New York - Role: Building
| Littlefield, Hamilton and Rhoda, House |
| Little House |
| Little Red |
| Little, Russell M., House |
| Little Theatre |
| Little York Pavilion |
| Livingston, Henry W., House |
| Livingston Memorial Church and Burial Ground |
| Livingston, Philip, Junior High School |
| Livingstonville Community Church |
| Livonia Baptist Church |
| Llenroc |
| Lloyd, Joseph, House |
| Loch Sheldrake Synagogue |
| Lock Tender's House and Canal Store Ruin |
| Locust Grove |
| Lodi Methodist Church |
| Loerzel Beer Hall |
| Loew’s Kameo Theater |
| Loew's Kings Theatre |
| Loew's State Theater |
| Loew, William Goadby, House |
| Logan Methodist Church |
| Log Cabin Church |
| Lomb, Adolph, House |
| Longbotham, Nathaniel, House |
| Long Island City Courthouse Complex |
| Long Island Rail Road Station at Farmingdale |
| Longue Vue Island |
| Look Building |
| Lord and Burnham Building |
| Lord, Dr. John, House |
| Lordville Presbyterian Church |
| Lorenzo |
| Lorillard Snuff Mill |
| Losee, Isaac, House |
| Losee, John, House |
| Lott, Hendrick I., House |
| Lower Mill |
| Low Memorial Library, Columbia University |
| Lowndes, Stanley H., House |
| Lowville Masonic Temple |
| Lowville Presbyterian Church |
| Luckey, Platt & Company Department Store |
| Ludlow-Van Rensselaer House |
| Ludlow, William Henry, House |
| Lunn-Musser Octagon Barn |
| Lustron Houses of Jermain Street Historic District |
| Lustron House Westchester Deluxe Model M02 #01310 |
| Lynch Hotel |
| Lynch, James, House |
| Lyndhurst, Jay Gould Estate |
| Lynfeld |
| Lyon Mountain Railroad Station |
| Lyon Street School |
| Mabee House |
| MacDonald Farm |
| Macedonia Baptist Church |
| Machpelah Cemetery |
| Mackay Estate Dairyman's Cottage |
| Mackay Estate Gate Lodge |
| Mackay Estate Water Tower |
| Mack, Gerald, House |
| Macmillan Building |
| Macomber Stone House |
| Macy, R. H., and Company Store |
| Mader House |
| Madison-Putnam-60th Place Historic District |
| MaGee, Merrill, House |
| Magen David Synagogue |
| Magill Cottage |
| Main Building, Vassar College |
| Maine Central School |
| Main Mall Historic District |
| Main School |
| Main Street School |
| Maizefield |
| Major's Inn and Gilbert Block |
| Mallory Mill |
| Mallows, The |
| Malone Armory |
| Malone Freight Depot |
| Maloney House |
| Mandel, Richard H., House |
| Mandeville House |
| Manhanset Chapel |
| Manhasset Monthly Meeting of the Society of Friends |
| Manhattan Beach Jewish Center |
| Manhattan Company Building |
| Manion's General Store |
| Mann, Andrew, Inn |
| Mann, Donald, House |
| Mann, Horace, School |
| Manny, Anthony, House |
| Manor Club |
| Mansakenning |
| Mapes, Mortimer L., House & Seward Homestead |
| Maple Grove |
| Maple Lawn |
| Maple Lawn Farm |
Data from United States Park Service and Wikidata
