Idaho - Significance region: Local
| McLaren, William and Elizabeth, House |
| Meadows Schoolhouse |
| Meinert Ranch Cabin |
| Melba I.O.OF. Lodge Hall |
| Mercy Hospital |
| Meridian Exchange Bank |
| Meridian Speedway |
| Methodist Episcopal Church |
| Mickle, Willis, House |
| Middleton Substation |
| Miner's Hat |
| Mitchell Hotel |
| Mittleider Farmstead Historic District |
| Montgomery Ward Building |
| Mooney-Dahlberg Farmstead |
| Morris Hill Cemetery Mausoleum |
| Morse, Burton, House |
| Moscow Carnegie Library |
| Moscow Downtown Historic District |
| Moscow High School |
| Mountain Home Baptist Church |
| Mountain Home Carnegie Library |
| Mountain Home Grange Hall |
| Mountain Home High School |
| Mountain Home Hotel |
| Mountain States Telephone and Telegraph Company Building |
| Murphy, Daniel F., House |
| Murphy, W. H., House |
| Myers School |
| Nampa American Legion Chateau |
| Nampa and Meridian Irrigation District Office |
| Nampa City Hall |
| Nampa Department Store |
| Nampa First Methodist Episcopal Church |
| Nampa Historic District |
| Nampa Neighborhood Historic District, Old |
| Nampa Presbyterian Church |
| Nampa Valley Grange No.131 |
| Neal, Halbert F. and Grace, House |
| Neal, W. Scott, House |
| Nesbit, G. V., House |
| Nesbitt, Amanda, House |
| Newman, A. G., House |
| Newman, J. W. and Rachel, House and Bunkhouse |
| New Plymouth Congregational Church |
| New Sweden School |
| Niece Brothers' Store |
| Nixon, Axel, House |
| Nob Hill Historic District |
| Noble Horse Barn |
| Nordby Farmstead |
| North Caldwell Historic District |
| North Shilling Historic District |
| North Side Canal Company Slaughter House |
| North Side School |
| Nu Art Theatre |
| Numbers, Dr. J. R., House |
| Nye, James, House |
| Obendorf, George, Gothic Arch Truss Barn |
| O'Farrell, John A., Cabin |
| Ola School |
| Old Challis Historic District |
| Old LDS Tithing/Paris Post Building |
| Old Town Residential Historic District |
| Olley, Thomas, House |
| Olson, Charles A. and Mary, House |
| O'Neill Brothers Building |
| Oregon Short Line Railway Depot |
| Orofino Historic District |
| Osborne, Jessie, House |
| Oughton, Jack, House |
| Our Lady of Limerick Catholic Church |
| Our Lady, Queen of Heaven Church |
| Owyhee County Courthouse |
| Palisades Dam and Powerplant Historic District |
| Palumbo, J. C., Fruit Company Packing Warehouse Building |
| Paris Cemetery |
| Paris Lumber Company Building |
| Paris Photo Studio |
| Paris Public School |
| Parker, John, House |
| Paul, Denton J., Water Tank |
| Payette City Hall and Courthouse |
| Paynton, Charles, House |
| Peck, Bill, House |
| Peck, D. H., House |
| Peckham Barn |
| Pen d'Oreille City |
| Pendrey, Arthur, Cottage |
| Pendrey Drug Store Building |
| Pendrey, Joe and Zina, Bungalow |
| Penwell House |
| Phelphs, Kenneth G., Barn |
| Pierce Park School |
| Pine Creek Baptist Church |
| Pleasant Valley School |
| Pleasant View School |
| Pleasant View School II |
| Pocatello Federal Building |
| Pocatello Warehouse Historic District |
Data from United States Park Service and Wikidata
