Utah - Area of significance: Architecture
| McMichael, William and Elizabeth, House |
| McMurdie-White Farmstead |
| McPolin Farmstead |
| McRae, Joseph and Marie N., House |
| Meadowcroft, Charles, House |
| Meek, Benjamin and Olivia, House |
| Meeting Hall |
| Merrihew, Harry B., Drugstore |
| Merrill, Louis Edgar and Clara H., House |
| Metcalf, James and Caroline M., House |
| Meyer, Frederick A. E., House |
| Midvale City Hall |
| Midway Town Hall |
| Miller, William H. and Helen, House |
| Mills-Hancock House |
| Mitchell, Alexander, House |
| Mitchell, Byron T., House |
| Mitton, Samuel Crowthers, House |
| Moab LDS Church |
| Monroe City Hall |
| Monroe Presbyterian Church |
| Moon House Complex |
| Morgan, David, House |
| Morgan High School Mechanical Arts Building |
| Morgan Historic District |
| Morgan, Jesse, House |
| Morgan, William, House |
| Moroni Opera House |
| Morrill, John and Ella, House |
| Morris, Andrew James, House |
| Morrison, Hattie Merrill, Farmstead |
| Morrison-Merrill Lumber Company Office and Warehouse |
| Morris, Richard Vaughen, House |
| Mortensen-Nelson House |
| Mountain View Auto Court |
| Mountair Acres Subdivision Historic District |
| Mountair Canyon Historic District |
| Mount Pleasant Commercial Historic District |
| Mount Pleasant National Guard Armory |
| Moyes, William, Jr., House |
| Moyle House and Indian Tower |
| Muir, David, House |
| Muir House |
| Muir, James A. and Janet, House |
| Murdoch, John, House |
| Murdock, Jack M., House |
| Murdock, Joseph S., House |
| Murray City Diesel Power Plant |
| Murray Downtown Historic District |
| Murray Downtown Residential Historic District |
| Murray, George, House |
| Murray Hillside Historic District |
| Murray LDS Second Ward Meetinghouse |
| Murray Theater |
| Museum-Grotto Residence |
| Myrick, William and Martha, House |
| Myton Presbyterian Church |
| National Park Service Housing, Old, Historic District |
| Navajo Mountain Day School and Community Center Historic District |
| Neilson, N. S., House |
| Nelden, William A., House |
| Nelson-Beesley House |
| Nelson, Harlan and Marie, House |
| Nelson, Nels A., House |
| Neuhausen, Carl M., House |
| New York Hotel |
| Nielsen, Jens, House |
| Nielsen-Sanderson House |
| Nielson, John R., Cabin |
| Nowers, Wilson G., House |
| Oak Creek Historic District |
| Oakley, Ami and Amanda, House |
| Oakwood |
| Oberg-Metcalf House |
| Odd Fellows Hall |
| Ogden Central Bench Historic District |
| Ogden Fire Station No. 2 |
| Ogden High School |
| Ogden Union Stockyard Exchange Building |
| Ogden/Weber Municipal Building |
| Olcott, Frances A., House |
| Old Clock at Zion's First National Bank |
| Old Main, Utah State University |
| Olpin, Joseph, House |
| Olsen, Hans Peter, House |
| Olsen House and Mortuary |
| Olson, Erick Lehi and Ingrid Larsen, House |
| O'Mahony Dining Car No. 1107 |
| Ophir Town Hall |
| Oquirrh School |
| Oregon Short Line Depot |
| Oregon Shortline Railroad Company Building |
| Orpheum Theatre |
| Orwin, Jessie, House |
| Ostler, John Thomas and Myrtle Bodell, House |
| Ottesen, Hans, House |
| Owens Jr., William T. and Mary Isabell R., House |
| Pacific Northwest Pipeline Building |
| Packard, Milan and Margaret, House |
| Page, Daniel R. and Sophia G., House |
Data from United States Park Service and Wikidata
