Missouri - Criteria: A (event)
| Lock and Dam No. 22 Historic District |
| Lock and Dam No. 24 Historic District |
| Lock and Dam No. 25 Historic District |
| Locust Street Apartments |
| Locust Street Automotive District |
| Locust Street Historic District |
| Loew's Midland Theater-Midland Building |
| Lohman's Landing Building |
| Long, R.A., Building |
| Longview Farm |
| Loretto Academy |
| Louisiana Chicago & Alton Railroad Depot |
| Louisiana Public Library |
| Lowe and Campbell Sporting Goods Building |
| Lower Parker School |
| Lucas Avenue Industrial Historic District |
| Luce-Dyer House |
| Luyties Homeopathic Pharmacy Company Building |
| Luzier Special Formula Laboratories Building |
| Lyceum, The |
| Lyric Theater |
| Mackay Building |
| Maclay Mansion |
| Macon County Courthouse and Annex |
| Madison County Courthouse |
| Magnolia Mills |
| Main and Eight Streets Historic District |
| Main-Spanish Commercial Historic District |
| Majestic Hotel |
| Majestic Manufacturing Company Buildings |
| Major Hotel |
| Mansur, Isiah, Farmstead Historic District |
| Maplewood |
| Maramec Iron Works District |
| Maries County Jail and Sheriff's House |
| Marion County Courthouse |
| Marion County Jail and Jailor's House |
| Mark Twain Historic District |
| Mark Twain Hotel |
| Mark Twain School |
| Mark Twain State Park Picnic Shelter at Buzzard's Roost |
| Marquette Hotel |
| Marquette Hotel |
| Marshall Hotel |
| Marshall School |
| Marthasville Hardware Building |
| Martin Hotel |
| Marty, Albert, Building |
| Marx-Hurlburt Building |
| Masonic Lodge |
| Masonic Temple |
| Masterson, Robert, House |
| May Company Department Store Building |
| Mayfield, Will, College Campus |
| Mays, Terry, House |
| McBride, William Cullen, Catholic High School |
| McCain Furniture Store |
| McCormick Distillery |
| McGarry House |
| McIntyre-Burri House |
| McKittrick Farmers Mercantile |
| McNew, Thornton, House |
| McVey School |
| Measuregraph Company Building |
| Medart's |
| Meier General Store |
| Meloan, Cummins & Co., General Store |
| Meramec River U.S. Bridge - J421 |
| Meramec State Park Beach Area Historic District |
| Meramec State Park Lookout House/Observation Tower |
| Meramec State Park Pump House |
| Meramec State Park Shelter House |
| Meyer, August, House |
| Meyer, John, House |
| Middle West Hotel |
| Mid-Town Historic District |
| Midwest Hotel |
| Midwest Terminal Building |
| Milan Railroad Depot |
| Miller Building |
| Miller Building, Matthews Hardware, Metropolitan Building |
| Miller-Seabaugh House and Dr. Seabaugh Office Building |
| Mill Pond |
| Mindrup House-Store |
| Mississippi Valley Trust Company Building |
| Missouri Athletic Club Building |
| Missouri Botanical Gardens |
| Missouri City Savings Bank Building and Meeting Hall |
| Missouri District Warehouse |
| Missouri Electric Light and Power Co. |
| Missouri, Kansas and Texas Railroad Depot |
| Missouri, Kansas, and Texas Railroad Depot |
| Missouri Pacifc Building |
| Missouri Pacific Depot |
| Missouri/Sedalia Trust Company |
| Missouri State Capitol Building and Grounds |
| Missouri State Penitentiary Warden's House |
| Missouri State Teachers Association |
| Missouri Theater |
| Missouri Theater and Missouri Theater Building |
Data from United States Park Service and Wikidata
