Wisconsin - Role: Building
| Lawson Airplane Company-Continental Faience and Tile Company |
| Lawton, C. A., Company |
| Leitch, William T., House |
| Lena Road School |
| Lenfestey, Agnes and Ruth Lenfestey Mark, House |
| Leonard, William Ellery, House |
| Leopold, Aldo, Shack |
| Lewis Farmhouse |
| Lewis, Frank T. and Polly, House |
| Lewis, Gov. James T., House |
| Lewis-Williams House |
| Lie, Aslak, Cabin |
| Lincoln County Courthouse |
| Lincoln School |
| Lincoln School |
| Lincoln School |
| Lindauer and Rupert Block |
| Linden High School |
| Linden Methodist Church |
| Lindsay-Bostrom Building |
| Lindsley, Perry, House |
| Lindstrom, John, Round Barn |
| Little Norway |
| Little White Schoolhouse |
| Little White Schoolhouse |
| Lockwood Barn |
| Loeffler, Otto and Ida, House |
| Loewe-Weis-Wilson Farm |
| Lohman Funeral Home and Livery Stable |
| Longfellow School |
| Longfellow School |
| Loomis, Horace, House |
| Lord, Charles, House |
| Loreto Shrine Chapel |
| Lougee, George A., House |
| Lovejoy and Merrill-Nowlan Houses |
| Lueder, Rudolph, 13 Sided Barn |
| Lutheran Indian Mission |
| Luther, J. P., Company Glove Factory |
| Luther Memorial Church |
| Lutze Housebarn |
| Lutz, Robert, House |
| Machek, Robert, House |
| Machinery Row |
| Mackie Building |
| Madison Brass Works |
| Madison Candy Company |
| Madison Gas and Electric Company Powerhouse |
| Madison Masonic Temple |
| Madison Saddlery Company |
| Madison Vocational School |
| Madison Waterworks |
| Main Hall |
| Main Hall/La Crosse State Normal School |
| Main Hall, Lawrence University |
| Manitou Camp |
| Manitowoc County Courthouse |
| Mann, John, House |
| Mann, William G., House |
| Manor House |
| Mansfield, George C., Company Building |
| Manson, Charles L. and Dorothy, House |
| Maple Bluff Boy Scout Cabin |
| Marathon Shoe Company East Side Plant |
| Marchetti, Louis, House |
| Marcus, Samuel and Nina, House |
| Maria Angelorum Chapel |
| Marion Park Pavilion |
| Marquette County Courthouse and Marquette County Sheriff's Office and Jail |
| Marshall & Ilsley Bank |
| Marshall Memorial Hall |
| Marshfield Post Office |
| Marshfield Senior High School |
| Martens, Julius J., Company Building |
| Marx, Albert and Theresa, House |
| Maryland Block |
| Masonic Temple |
| Masonic Temple |
| Masonic Temple Building |
| Mason Manor |
| Mathey Building |
| Mathie, Karl, House |
| May, Eli, House |
| Mayer-Bankerob House |
| Mayer Boot and Shoe Company Building |
| Mayer, George P., Boathouse |
| Mayo School |
| Mazomanie Town Hall |
| McCaffary, John, House |
| McCarthy, Timothy C. and Katherine, House |
| McClelland-Kasuboski House |
| McClurg Building |
| McCormick-International Harvester Company Branch House |
| McCoy Farmhouse |
| McCullough and Dixon Steam Laundry and Soap Company |
| McDermott, William and Annie, House |
| McDonell High School |
| McEwan, Peter, Warehouse |
| McEwens, John F., House |
| McFarlane, Harold J. and Agnes, Stone House and Barn |
Data from United States Park Service and Wikidata
