Missouri - Area of significance: Architecture
| Moberly Municipal Auditorium |
| Moline Plow Company Building |
| Moller House |
| Moniteau County Courthouse Square |
| Monje, Paul, House |
| Montauk State Park Open Shelter |
| Montgomery Opera House |
| Montgomery Ward and Company General Merchandise Warehouse |
| Montserrat Recreational Demonstration Area Rock Bath House |
| Montserrat Recreational Demonstration Area Warehouse #2 and Workshop |
| Montserrat Recreation Demonstration Area Bridge |
| Montserrat Recreation Demonstration Area Dam and Spillway |
| Montserrat Recreation Demonstration Area Entrance Portal |
| Moon Brothers Carraige Company Building |
| Moore-Dalton House |
| Moore House |
| Moore, J. Herbert, House |
| Moore, Thomas, House |
| Moorlands Addition Apartment District |
| Moreau Drive Historic District |
| Moreau Park Historic District |
| More Automobile Company Building |
| Morgan County Courthouse |
| Morningside Acres Historic Ranch House District |
| Morrison, Alfred W., House |
| Morrow, Johnson, House |
| Morton-Myer House |
| Mountain Grove Bandstand |
| Mount Cabanne-Raymond Place Historic District |
| Mount Hope Cemetery |
| Mount Horeb Baptist Church |
| Mount Mora Cemetery |
| Mount Nebo Baptist Church |
| Mount Pleasant School |
| Mount Washington School |
| Mount Zion Church and Cemetery |
| Mount Zion Lodge Masonic Temple |
| Mt. Carmel Historic District |
| Mt. Pleasant Winery Historic District |
| Mudd's Grove |
| Mule Barn Theatre |
| Mullanphy Historic District |
| Municipal Courts Building |
| Munro, John Manson, House |
| Murdock, C.A., Manufacturing Company Building |
| Murphy-Blair District |
| Murphy, Joseph and Ann, Residence |
| Murphysburg Historic District |
| Murrell, George A., House |
| Museum Hill Historic District |
| Myers, George J., House |
| Myers, John B., House |
| National Bank of Commerce Building |
| Neely Elementary School |
| Neighborhood Gardens Apartments |
| Nelson, Thomas, House |
| Neosho Commercial Historic District |
| Neosho High School |
| Netter-Ullman Building |
| Newbern Hotel |
| Newbill-McElhiney House |
| Newcomer's, D. W., Sons Funeral Home |
| New England Apartments |
| New Franklin Commercial Historic District |
| New Haven Commercial Historic District |
| New Haven Residential Historic District |
| New Hope Primitive Baptist Church |
| New Lebanon Cumberland Presbyterian Church and School |
| New Lebanon Historic District |
| Newman Brothers Building |
| New Mount Sinai Cemetery |
| New York Life Building |
| Nichols Farm District |
| Nicholson, George E., House |
| Nicolay House |
| Nims Mansion |
| Nipher, Prof. Frances e., House |
| Nodaway County Courthouse |
| Noland, Smallwood V., House |
| Norman School |
| Norris, Jewett, Library |
| North Broadway Glass and Plow Warehouse District |
| Northeast Douglas Street Residential Historic District |
| Northeast Forest Avenue and Northeast Green Street Residential Historic District |
| Northeast Green and 1st Streets Residential Historic District |
| Northern Methodist Episcopal Church of Clarksville |
| North, James, House |
| North Main Street Historic District |
| North Main Street Historic District |
| North Ninth Street Historic District |
| North Taylor Avenue Historic District |
| North Third Street Historic District |
| Norwood Hills Country Club |
| Oakherst Place Concrete Block District |
| Oakwood |
| O'Bannon Homestead |
| Odd Fellows Home District |
| O'Hara, Mark, House |
| Old Barnhill Building |
| Old Calabosse |
Data from United States Park Service and Wikidata
