South Dakota - Significance region: Local
| Jones, Mack, House |
| Jones, Tom, Ranch |
| Kant Hotel |
| Karcher Block |
| Karcher-Sahr House |
| Karl, Art, Farm |
| Karpen, Anton and Mary Agnes, House |
| Keets, Henry, House |
| Kennedy, C.B., Mansion |
| Keystone School |
| Keystone Trading Company Store |
| Kibbee-Nepstad House |
| Kingsbury County Courthouse |
| Kliegle Garage |
| Knapp Ranch |
| Knight, Webb S., House |
| Koch Apartments |
| Koch, George and Mary, Farm |
| Koch, William, House |
| Koobs House |
| Kost Farm Barn |
| Kranzburg School District No. 5 |
| Kroll Meat Market and Slaughterhouse |
| Krueger, William C. and Anna, Barn |
| Kuehn, Andrew, Warehouse |
| Kuhle, Henry, House |
| L & A Baking Company |
| Lake Badus Rural Agricultural Historic District |
| Lake County Courthouse |
| Lake Madison Lutheran Church |
| Lake Preston High School |
| Lake Preston Tourist Park Historic District |
| Lamont, Margaret and Maurice, House |
| Lampert, Charles and Ollie, Ranch |
| Langdon School |
| Larson, John August, Home |
| LaSalle Apartments |
| Lebanon Lutheran Church |
| Lincoln House |
| Lincoln School |
| Lincoln School #12 |
| Linden House |
| Lip's Camp |
| Little Missouri Bank Building |
| Livingston, John and Daisy May, Ranch |
| Lockhart House |
| Log Cabin Tourist Camp |
| Lohr, Charles and Mary, House |
| Long View Stock Farm |
| Lower Antelope Creek Site |
| Lown, William Ernest, House |
| Luce, Herman, Cabin |
| Lund, Daniel, House |
| Mackay, William A., House |
| Madison Historic District |
| Madison Masonic Temple |
| Madison Ranch |
| Mail Building, The |
| Mann, Irene and Walter, Ranch |
| Manthey Barn |
| Markham Farmstead |
| Marshall County Courthouse |
| Masonic Temple |
| Mathews, G. A., House |
| Mauseth, Peter, House |
| Maxon, Margaret and Vernon, House |
| McCook County Courthouse |
| McDonald, Henry M., House |
| McEachron, C. E., General Merchandise |
| McGregor House |
| McKenzie-Cassels House |
| McLaughlin Ranch Barn |
| McMillan, John and Elsie, House |
| McMillen, George, House |
| McMonies Barn |
| McPherson County Courthouse |
| McWhorter, Port and Helen, House |
| Meade, Judge C. D., House |
| Melham, Andrew and Lulu, House |
| Messler, Daniel A., Homestead |
| Methodist Episcopal Church |
| Methodist Episcopal Church |
| Metzgers, William, New Emporium |
| Micheel, Herman F., Gothic Arched-Roof Barn |
| Milbank Carnegie Library |
| Milne, William G., House |
| Milwaukee Road Freight House |
| Minneapolis and St. Louis Railroad Depot |
| Minneapolis and St. Louis Railroad Depot |
| Minneapolis Brewing Company Beer Warehouse |
| Mitchell Lustron Historic District |
| Mitchell West Central Residential Historic District |
| Mobridge Auditorium |
| Modern Woodmen of America Hall |
| Molstad Lake Park |
| Monfore, Peter and Minnie, House |
| Moody County Courthouse |
| Morrison, Edward, House |
| Motor Service Company |
| Mount Hope Cemetery Mausoleum |
Data from United States Park Service and Wikidata
