Minnesota - Significance region: Local
| Nicollet House Hotel |
| Nobles County War Memorial Building |
| Nokomis Knoll Residential Historic District |
| Nora Free Christian Church |
| 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 Passenger Depot |
| Northern Pacific Passenger Depot |
| Northern Pacific Railway Company Como Shops Historic District |
| Northern Pacific Railway Depot |
| Northern Pacific Railway Depot and Freighthouse |
| Northfield Commercial Historic District |
| North Front Street Commercial District |
| North Mankato Public School |
| Northrup. King & Company Complex |
| Northstar Center |
| Norway Township Stone House |
| Norwegian Evangelical Lutheran Church |
| Norwood Methodist Episcopal Church |
| Noyes, Charles P., Cottage |
| Noyes, Jonathon L. and Elizabeth H. Wadsworth, House |
| Nuffer, Jacob, Farmstead |
| Nutting, John C., House |
| Oakwood Cemetery |
| Ochs, Adolph C., House |
| Odeon Theater |
| Odessa Jail |
| O'Donnell Shoe Company Building |
| Ogden Apartment Hotel |
| Olcott Park Electric Fountain and Rock Garden |
| Old Backus |
| Oldenburg, Henry C., House |
| Oldenburg, John A., House |
| Old Federal Courts Building |
| Old Main-Gustavus Adolphus College |
| Old Main, Mankato State Teachers College |
| Old Main, St. Olaf College |
| Oliver Boarding House |
| Oliver, Capt. John, House |
| Olness, John, House |
| Olson, Oscar, House |
| Omaha Depot |
| Onamia Municipal Hall |
| Oronoco School |
| Ortonville Commercial Historic District |
| Ortonville Free Library |
| Osbeck, Ernst, House |
| Osborn Building |
| Osmund Osmundson House |
| Osseo Water Tower |
| Oster, John, House |
| Ottawa Township Hall |
| Our Lady of the Angels Academy |
| Owatonna City and Firemen's Hall |
| Owatonna Commercial Historic District |
| Owre, Dr. Oscar, House |
| Paine, H. A., House |
| Palace Theater |
| Palmer House Hotel |
| Pan Motor Company Office and Sheet Metal Works |
| Paramount Theater |
| Park, David, House |
| Park Elementary School |
| Parker Building |
| Park Place Historic District |
| Park Rapids Jail |
| Park Region Luther College |
| Parsons Block and Hall |
| Partridge Township Hall |
| Patterson-Hernandez House |
| Payne Avenue State Bank |
| Peet, David N., Farmstead |
| Pennie, Daniel, House |
| People's Union Church |
| Pequot Fire Lookout Tower |
| Perham Village Hall and Fire Station |
| Pest House |
| Peters, Ferdinand, House |
| Pfeiffer, John Gottlieb, House |
| Phelps Mill |
| Phelps Mill Historic District |
| Phi Gamma Delta Fraternity House |
| Pilgrim Baptist Church |
| Pill Hill Residential Historic District |
| Pillsbury Academy Campus Historic District |
| Pine Island City Hall and Fire Station |
| Pine River to Woman Lake and Longville Stagecoach Road-Widow Lake Segment Historic District |
| Pine Tree Lumber Company Office Building |
| Pipestone County Courthouse |
| Pipestone Public Library |
| Pipestone Water Tower |
| Plymouth Building |
| Poehler, August F., House |
Data from United States Park Service and Wikidata
