Missouri - Criteria: A (event)
| Missouri United Methodist Church |
| Missouri Valley Trust Company Historic District |
| Moberly Commercial Historic District |
| Moberly Junior High School |
| Moloney Electric Company Building |
| Monroe Hotel |
| 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 |
| Moreau Drive Historic District |
| Moreau Park Historic District |
| More Automobile Company Building |
| Morgan County Courthouse |
| Morrill, Levi, Post |
| Moselle Iron Furnace Stack |
| Mountain Grove Bandstand |
| Mountain Grove City Hall |
| Mount Horeb Baptist Church |
| Mount Nebo Baptist Church |
| Mount Washington School |
| Mt. Carmel Historic District |
| Mt. Memorial Cemetery |
| Mt. Pleasant Winery Historic District |
| Munichburg Commercial Historic District |
| Municipal Service Building |
| Murdock, C.A., Manufacturing Company Building |
| Murphysburg Historic District |
| Murrell, George A., House |
| Mutual Ice Company Building |
| Mutual Musicians' Foundation Building |
| Myers, John B., House |
| Nance, Della, House |
| Narrow Gauge Railroad Station |
| National Bank of Commerce Building |
| National Bank of Rolla Building |
| National Candy Company Factory |
| National Cash Register Company Sales and Repair Building |
| Neff Tavern Smokehouse |
| Negro Masonic Hall |
| Neighborhood Gardens Apartments |
| Nelson-Pettis Farmsteads Historic District |
| Nelson, Thomas, House |
| Neosho Colored School |
| Neosho Commercial Historic District |
| Neosho High School |
| Neosho Wholesale Grocery Company |
| Netter-Ullman Building |
| Nettleton, George H., Home |
| Newcomer's, D. W., Sons Funeral Home |
| New Franklin Commercial Historic District |
| New Haven Commercial Historic District |
| New Lebanon Cumberland Presbyterian Church and School |
| New Lebanon Historic District |
| Newman Brothers Building |
| New Mount Sinai Cemetery |
| Nichols Farm District |
| Nodaway County Courthouse |
| Noland, Smallwood V., House |
| Nooter Corporation Building |
| Norris, Jewett, Library |
| North, James, House |
| North Main Street Historic District |
| North Ninth Street Historic District |
| North Third Street Historic District |
| North Ward School |
| Norwood Hills Country Club |
| Oakley Chapel African Methodist Episcopal Church |
| Oakview Place Apartments |
| Oberman, D.M., Manufacturing Co. Building |
| Odd Fellows Home District |
| Odessa Ice Cream Company Building |
| Oehler Brick Buildings |
| Old Appleton Bridge |
| Old Calabosse |
| Old City Hall |
| Old Gerald School |
| Old Lorimier Cemetery |
| Old McDonald County Courthouse |
| Old Mill at Montauk State Park |
| Old New England Building |
| Old Stagecoach Stop |
| Old Stone Hill Historic District |
| Old St. Patrick's Church |
| Olean Railroad Depot |
| Olive Chapel African Methodist Episcopal Church |
| Onyx Cave |
| Opera Hall Block |
| Osage County Poorhouse |
| Osage Hills School |
| Osceola Public School Building |
| Owens, Hazel, House |
| Ozark Courthouse Square Historic District |
| Ozark Iron Furnace Stack |
| Pacini, Armando, Restaurant |
Data from United States Park Service and Wikidata
