Minnesota - Role: Building
| Morris Carnegie Library |
| Morris Industrial School for Indians Dormitory |
| Morrison County Courthouse |
| Morristown Feed Mill |
| Morse Jr., Elisha and Lizzie, House |
| Moser, Louis J., House |
| Mower, John and Martin, House and Arcola Mill Site |
| Mudbaden Sulphur Springs Company |
| Muench, Adolf, House |
| Munch, Paul, House |
| Munch-Roos House |
| Munger Terrace |
| Murdock, Sabin S., House |
| Muskego Church |
| Naniboujou Club Lodge |
| National Farmers' Bank |
| National Woodenware Company Superintendent's Residence |
| Needham-Hayes House |
| Neils, Frieda and Henry J., House |
| Nelimark, Erick and Kristina, Sauna |
| Nelson and Albin Cooperative Mercantile Association Store |
| Nelson, Knute, House |
| Nelson, Perry, House |
| Nelson School |
| Nerstrand City Hall |
| Newell, George R., House |
| New Main-Augsburg Seminary |
| New Market Hotel and Store |
| New Ulm Armory |
| New Ulm High School |
| New Ulm Oil Company Service Station |
| New Ulm Post Office |
| Nicherson-Tarbox House, Shed and Barn |
| Nicollet County Bank |
| Nicollet County Courthouse and Jail |
| Nicollet House Hotel |
| Nobles County War Memorial Building |
| Noerenberg Estate Barn |
| Nora Free Christian Church |
| Norman County Courthouse |
| Norseland General Store |
| Norseth, Martin, House |
| Northeastern Hotel |
| North East Neighborhood House |
| Northern Federal Building |
| Northern Pacific Depot |
| Northern Pacific Depot |
| Northern Pacific Depot |
| Northern Pacific Depot |
| Northern Pacific Depot |
| Northern Pacific Passenger Depot |
| Northern Pacific Passenger Depot |
| Northern Pacific Railway Depot |
| Northern Pacific Railway Depot and Freighthouse |
| North Mankato Public School |
| Northrup. King & Company Complex |
| Northstar Center |
| Northwest Company Post |
| Northwestern Knitting Company Factory |
| Northwestern National Life Insurance Company Home Office |
| Norway Township Stone House |
| Norwegian Evangelical Lutheran Church |
| Norwood Methodist Episcopal Church |
| Noyes, Charles P., Cottage |
| Noyes Hall, State School for the Deaf |
| Noyes, Jonathon L. and Elizabeth H. Wadsworth, House |
| Nuffer, Jacob, Farmstead |
| Nutting, John C., House |
| Oberhoffer, Emil J., House |
| Ochs, Adolph C., House |
| Odeon Theater |
| Odessa Jail |
| O'Donnell Shoe Company Building |
| Ogden Apartment Hotel |
| Old Cut Foot Sioux Ranger Station |
| Oldenburg, Henry C., House |
| Oldenburg, John A., House |
| Old Federal Courts Building |
| Old Main, Dr. Martin Luther College |
| Old Main-Gustavus Adolphus College |
| Old Main, Macalester College |
| Old Main, Mankato State Teachers College |
| Old Main, St. Olaf College |
| Oliver Boarding House |
| Oliver, Capt. John, House |
| Olness, John, House |
| Olson, Floyd B., House |
| Olson, Oscar, House |
| Olson, Sigurd F., Writing Shack |
| Omaha Depot |
| Onamia Municipal Hall |
| Oronoco School |
| Ortonville Free Library |
| Osbeck, Ernst, House |
| Osborn Building |
| Oskam, Hendrik and Marrigje (Marri), House |
| Osmund Osmundson House |
| Oster, John, House |
| Ottawa Township Hall |
| Otter Tail County Courthouse |
Data from United States Park Service and Wikidata
