Minnesota - Area of significance: Architecture
| Ness Lutheran Church and Cemetery |
| Newell, George R., House |
| New Main-Augsburg Seminary |
| New Market Hotel and Store |
| New Ulm Post Office |
| Nicherson-Tarbox House, Shed and Barn |
| Nicollet County Bank |
| Nicollet County Courthouse and Jail |
| Noerenberg Estate Barn |
| Nokomis Knoll Residential Historic District |
| Norman County Courthouse |
| Norseth, Martin, House |
| Northern Federal Building |
| Northern Pacific Railroad Shops Historic District |
| 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 |
| Northrop Mall Historic District |
| Northwest Company Post |
| 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 |
| Nymore Bridge |
| Oakwood Cemetery |
| Oberhoffer, Emil J., House |
| Ochs, Adolph C., House |
| Odeon Theater |
| Oldenburg, John A., House |
| Old Federal Courts Building |
| Old Frontenac Historic District |
| 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 |
| Old Mill State Park WPA/Rustic Style Historic Resources |
| Oliver, Capt. John, House |
| Olness, John, House |
| Olson, Oscar, House |
| Onamia Municipal Hall |
| Oronoco School |
| Ortonville Commercial Historic District |
| Ortonville Free Library |
| Osbeck, Ernst, House |
| Osborn Building |
| Oskam, Hendrik and Marrigje (Marri), House |
| Oster, John, House |
| Ottawa Township Hall |
| Otter Tail County Courthouse |
| Owatonna City and Firemen's Hall |
| Owatonna Free Public Library |
| Owre, Dr. Oscar, House |
| Paine, H. A., House |
| Palace Theater |
| Palmer House Hotel |
| Paramount Theater |
| Park, David, House |
| Parker Building |
| Parker, Charles and Grace, House |
| Park Place Historic District |
| Park Region Luther College |
| Parsons Block and Hall |
| Patterson-Hernandez House |
| Perham Village Hall and Fire Station |
| Peters, Ferdinand, House |
| Pfeiffer, John Gottlieb, House |
| Phelps Library, Shattuck School |
| Phi Gamma Delta Fraternity House |
| Pickwick Mill |
| Pill Hill Residential Historic District |
| Pillsbury Academy Campus Historic District |
| Pine Island City Hall and Fire Station |
| Pioneer and Endicott Buildings |
| Piper, Daniel S., House |
| Pipestone Commercial Historic District |
| Pipestone County Courthouse |
| Pipestone Public Library |
| Plummer, Henry S., House |
| Poehler, August F., House |
| Pond, Gideon H., House |
| Poorbaugh, John M., Block |
| Pope County Courthouse |
| Portland Prairie Methodist Episcopal Church |
| Pratt-Tabor House |
| Prospect House |
| Prospect Park Water Tower and Tower Hill Park |
| Purcell, William Gray, House |
| Pyhala, Anna and Mikko, Farm |
| Quickstad Farm Implement Company |
| Quinlan, Elizabeth C., House |
| Rahilly, Patrick H., House |
Data from United States Park Service and Wikidata
