Utah - Significance region: Local
| Maycock, John, Cabin |
| McAllister,James G., House |
| McBride-Sims Garage |
| McDonald, David, House |
| McGregor Apartments |
| McIntyre House |
| McLachlan, William, Farmhouse |
| McMichael, William and Elizabeth, House |
| McMurdie-White Farmstead |
| McPolin Farmstead |
| McRae, Joseph and Marie N., House |
| Meek, Benjamin and Olivia, House |
| Meeks-Green Farmstead |
| Mendon Station |
| Meneray, William H. and Sarah D., House |
| Merrihew, Harry B., Drugstore |
| Merrill, Louis Edgar and Clara H., House |
| Metcalf, James and Caroline M., House |
| Mickelsen, Joseph E. and Mina W., House |
| Mickelsen, S.J., Hardware Store and Lumber Yard |
| Mickelson, Hyrum and Mary A. Terry Peterson, House |
| Midvale City Hall |
| Midway Social Hall |
| Midway Town Hall |
| Millard Academy |
| Miller, William H. and Helen, House |
| Mills-Hancock House |
| Mitchell, Alexander, House |
| Mitchell, Byron T., House |
| Mitton, Samuel Crowthers, House |
| Moab Cabin |
| Moab LDS Church |
| Morgan, David, House |
| Morgan Historic District |
| Morgan Union Pacific Depot |
| Moroni Opera House |
| Morrell, Lesley, Line Cabin and Corral |
| Morrill, John and Ella, House |
| Morris, Josie Bassett, Ranch Complex |
| Morrison, Hattie Merrill, Farmstead |
| Morrison-Merrill Lumber Company Office and Warehouse |
| Morris, Richard Vaughen, House |
| Mortensen-Nelson House |
| Mountain States Telephone and Telegraph Building |
| Mountain States Telephone and Telegraph Co. Garage |
| Mountain View Auto Court |
| Mountair Acres Subdivision Historic District |
| Mountair Canyon Historic District |
| Moyle House and Indian Tower |
| Mt. Carmel School and Church |
| Muir House |
| Muir, James A. and Janet, House |
| Murdock, Joseph S., House |
| Murphy Trail and Bridge |
| Murray City Diesel Power Plant |
| Murray Downtown Historic District |
| Murray Downtown Residential Historic District |
| Murray Hillside Historic District |
| Murray LDS Second Ward Meetinghouse |
| Murray Theater |
| Myton Presbyterian Church |
| National Park Service Housing, Old, Historic District |
| Natural Bridges National Monument Visitor Center |
| Neck and Cabin Springs Grazing Area |
| Neilson, N. S., House |
| Nelden, William A., House |
| Nelson, August M. and Mabel Jensen, House |
| Nelson-Beesley House |
| Nelson, Harlan and Marie, House |
| Nelson, Nels A., House |
| New Brigham Hotel |
| New York Hotel |
| Nielsen-Sanderson House |
| Nielson, Jens, House |
| Nielson, John R., Cabin |
| Nordell's Fort |
| Oak Creek Dam |
| Oakley, Ami and Amanda, House |
| Oberg-Metcalf House |
| Ogden Central Bench Historic District |
| Ogden Fire Station No. 2 |
| Ogden Union Stockyard Exchange Building |
| Oldham, John and Elizabeth Brown, House |
| Old Spanish Trail |
| Oljato Trading Post |
| Olmsted Station Powerhouse |
| Olsen, Hans Peter, House |
| Olsen House and Mortuary |
| Olsen, Lars and Christina, House |
| Olson, Erick Lehi and Ingrid Larsen, House |
| Oquirrh School |
| Oregon Short Line Depot |
| Orem, Frank M., House |
| Orton-Malstrom House |
| Ostler, John Thomas and Myrtle Bodell, House |
| Owachomo Bridge Trail |
| Owens Jr., William T. and Mary Isabell R., House |
| Oyler Mine |
| Pacific Northwest Pipeline Building |
| Packard, Milan and Margaret, House |
Data from United States Park Service and Wikidata
