Minnesota - Criteria: C (architecture/engineering)
| Minnehaha Historic District |
| Minneopa State Park WPA/Rustic Style Historic Resources |
| Minnesota and International Railway Trestle at Blackduck |
| Minnesota Building |
| Minnesota Historical Society Building |
| Minnesota Home School for Girls Historic District |
| Minnesota Mutual Life Insurance Company Building |
| Minnesota Soldiers' Home Historic District |
| Minnesota State Capitol |
| Minnesota State Reformatory for Men Historic District |
| Minnesota State Training School |
| Minnesota Territorial-State Prison Warden's House |
| Mitchell-Tappan House |
| Mock Cigar Factory and House |
| Moe, Bergetta, Bakery |
| Mohrbacher, Paul, House |
| Moline, Milburn and Stoddard Company |
| Monson Lake State Park CCC/WPA/Rustic Style Historic Resources |
| Montevideo Carnegie Library |
| Montogomery, Sarah and Thomas, House |
| Moore, George M., Farmstead |
| Morris Carnegie Library |
| Morrison County Courthouse |
| Morse Jr., Elisha and Lizzie, House |
| Mower, John and Martin, House and Arcola Mill Site |
| Muench, Adolf, House |
| Munch-Roos House |
| Munger Terrace |
| Murdock, Sabin S., House |
| Muskego Church |
| Naniboujou Club Lodge |
| National Farmers' Bank |
| Neils, Frieda and Henry J., House |
| Nelimark, Erick and Kristina, Sauna |
| Nelson, Perry, House |
| Nelson School |
| 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 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 Mankato Public School |
| Northrop Mall Historic District |
| Northwest Company Post |
| Northwestern National Life Insurance Company Home Office |
| Norwood Methodist Episcopal Church |
| Noyes, Charles P., Cottage |
| Noyes Hall, State School for the Deaf |
| Noyes, Jonathon L. and Elizabeth H. Wadsworth, House |
| Nutting, John C., House |
| Nymore Bridge |
| Oberhoffer, Emil J., House |
| Ochs, Adolph C., House |
| Odeon Theater |
| Ogilvie Watertower |
| Olcott Park Electric Fountain and Rock Garden |
| 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 |
| ONOKO (Bulk Freight Steamer) Shipwreck |
| Oronoco School |
| Orr Roadside Parking Area |
| Ortonville Free Library |
| Osbeck, Ernst, House |
| Osborn Building |
| Osseo Water Tower |
| 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 |
Data from United States Park Service and Wikidata
