South Dakota - Area of significance: Architecture
| Jencks Farmstead |
| Jensen, Governor Leslie, House |
| Jerauld County Courthouse |
| Johnsen, Calle Nissen, Farm |
| Johnson, A. Einar, House |
| Johnson, Axel, Ranch |
| Johnson Barn |
| Johnson, Emil and Hannah, House |
| Johnson, Ole and Carris, Ranch |
| Johnson Siding, House and Sawmill |
| Johnson, William, House |
| Jolley Historic District |
| Jones, Mabel and David, House |
| Jones, Mack, House |
| Jorden Hall |
| Junker, Jens N. and Anna, Farmstead |
| Karcher-Sahr House |
| Karl, Art, Farm |
| Karpen, Anton and Mary Agnes, House |
| Keets, Henry, House |
| Kenaston, William G., House |
| Kennedy, C.B., Mansion |
| Keystone School |
| Keystone Trading Company Store |
| Kibbee-Nepstad House |
| Kietzman Farmstead |
| 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 |
| Kremer House |
| Krueger, William C. and Anna, Barn |
| Kudrna, Josef and Marie, Homestead and Ranch |
| Kuehn, Andrew, Warehouse |
| Kuhle, Henry, House |
| Lake Andes Carnegie Library |
| Lake Badus Rural Agricultural Historic District |
| Lake County Courthouse |
| Lake Madison Lutheran Church |
| Lake Preston High School |
| Lamont, Margaret and Maurice, House |
| Langdon School |
| Larson, John August, Home |
| Larson-Simonson House |
| LaSalle Apartments |
| Lasek, Mathias, House |
| Laurens Polygonal Hog House |
| Lead Historic District |
| Lenehan, Thomas, House |
| Lincoln House |
| Lincoln School #12 |
| Linden House |
| Little Village Farm Sale Barn |
| Livingston, John and Daisy May, Ranch |
| Lockhart House |
| Lohr, Charles and Mary, House |
| Long View Stock Farm |
| Lown, William Ernest, House |
| Luce, Herman, Cabin |
| Lund, Daniel, House |
| Machacek Homestead |
| Mackay, William A., House |
| Madison Historic District |
| Madison Masonic Temple |
| Madison Ranch |
| Main Hall |
| Manthey Barn |
| Marshall County Courthouse |
| Martin's Evangelical Church |
| Marty Mission School Gymnasium and St. Therese Hall |
| Masonic Temple |
| Mathews, G. A., House |
| Mathiesen House |
| Mauseth, Peter, House |
| Maxon, Margaret and Vernon, House |
| McCook County Courthouse |
| McDonald, Henry M., House |
| McEachron, C. E., General Merchandise |
| McGregor House |
| McGregor, Walker, Farmstead |
| McKennan Park Historic District |
| McKenzie-Cassels House |
| McLaughlin Ranch Barn |
| McMillan, John and Elsie, House |
| McMillen, George, House |
| McMonies Barn |
| McWhorter, Port and Helen, House |
| Meade, Judge C. D., House |
| Melham, Andrew and Lulu, House |
| Mellette House |
| Merk, Nels, Farmstead |
| Merkwan, John and Kate, Log and Rubblestone House |
| Merkwan, John and Kate, Rubblestone House-Barn |
| Merkwan, John, Jr., Rubblestone House |
| Merkwan, Mathias, Rubblestone Barn |
Data from United States Park Service and Wikidata
