South Dakota - Area of significance: Architecture
| Messler, Daniel A., Homestead |
| Methodist Episcopal Church |
| Methodist Episcopal Church |
| Methodist Episcopal Church of Wessington Springs |
| Metzgers, William, New Emporium |
| Micheel, Herman F., Gothic Arched-Roof Barn |
| Milbank Carnegie Library |
| Milford Hutterite Colony |
| Miller, L. D., Funeral Home |
| Milltown Hutterite Colony |
| Milne, William G., House |
| Minneapolis and St. Louis Railroad Depot |
| Minneapolis and St. Louis Railroad Depot |
| Minneapolis Brewing Company Beer Warehouse |
| Mitchell Historic Commercial District |
| Mitchell Lustron Historic District |
| Mitchell West Central Residential Historic District |
| Mobridge Auditorium |
| Mobridge Masonic Temple |
| Molstad Lake Park |
| Monfore, Peter and Minnie, House |
| Moody County Courthouse |
| Morrison, Edward, House |
| Mortimer Cabin |
| Moser, Wilhelm, House-Barn |
| Motor Service Company |
| Mount Hope Cemetery Mausoleum |
| Mount Theodore Roosevelt Monument |
| Mt. Moriah Masonic Lodge #155 |
| Mueller Homestead |
| Mundt, John, Building |
| Municipal Building-City Hall |
| Municipal Field House |
| Murdo State Bank |
| Murtha, Charles, House and Brick Yard |
| Nelson, Maurice, House |
| Nelson, Ole, Barn |
| Nemo School House |
| Newell High School |
| New Elmspring Colony |
| Newhall, Chandler Gray and Mary Abbie, House and Homestead Shack |
| New Hope Farm Polygonal Barn |
| New Hope Farm Swine Barn |
| Nichols Funeral Home Building |
| Nick's Hamburger Shop |
| Nielson, L.P., Barn |
| Nigg, Louis, Barn |
| Noll, Joseph, Chalkrock Barn |
| Nora Store |
| Norbeck-Nicholson Carriage House |
| Norbeck, Peter, Summer House |
| Oahe Addition Historic District |
| Ochszbner, Jacob, Sr., House |
| Odd Fellows Building |
| Odd Fellows Home of Dell Rapids |
| Ohlman-Shannon House |
| Old Catholic Church |
| Old Courthouse and Warehouse Historic District |
| Old Elmspring Hutterite Colony |
| Oldham Methodist Church |
| Old Main, Augustana Academy |
| Old Maxwell Hutterite Colony |
| Old Minnehaha County Courthouse |
| Old Riverside Hutterite Colony |
| Old Rockport Hutterite Colony |
| Old Spink Colony |
| Old St. Mary's Catholic Parish House |
| Olive Place |
| Olsen, Elias B., Ranch |
| Olson, Lewis, Log House |
| Omdalen Barn |
| Opitz, Edbert and Josie, House |
| Orpheum Theatre |
| Otho Mining District |
| Our Savior's Lutheran Church |
| Palestine Evangelical Lutheran Church |
| Parker Masonic Hall |
| Parmley, J. W., House |
| Parmley-Pankow House |
| Patterson Homestead |
| Peace Valley Evangelical Church and Cemetery |
| Pearson Cabin |
| Pechan, Frantisek, Log House |
| Penmarch Place |
| Pennington County Courthouse |
| Perkins Congregational Church |
| Peterson-Loriks House |
| Peterson, Mathias, Homestead |
| Pettigrew Barns |
| Pettigrew, R. F., and Tate, S. L., Building |
| Petty House |
| Phillips Block |
| Pierre American Legion Cabin |
| Pierre Hill Residential Historic District |
| Pierre Masonic Lodge |
| Pioneer Park Bandshell |
| Piper, Albert S., Homestead Claim Shanty |
| Plana School |
| Plumbing Supply Company |
| Pollock Depot |
Data from United States Park Service and Wikidata
