Alabama - Criteria: C (architecture/engineering)
| McMillan House |
| McMullan-Skinner House |
| McNab Bank Building |
| Meaher-Zoghby House |
| Megginson, Ernest, House |
| Meriwether, Dr. Willis, House |
| Merrimack Mill Village Historic District |
| Merritt School |
| Methodist Episcopal Church, South |
| Metzger House |
| Middle Bay Light |
| Midtown Historic District |
| Miller-Martin Town House |
| Miller-O'Donnell House |
| Milligan Block |
| Millwood |
| Milner Heights Historic District |
| Mobile City Hall |
| Mobile City Hospital |
| Mobley, Col. Green G., House |
| Monroeville Downtown Historic District |
| Montebrier |
| Monterey Place |
| Montgomery Hill Baptist Church |
| Montgomery-Janes-Whittaker House |
| MONTGOMERY (snagboat) |
| Montgomery Union Station and Trainshed |
| Montgomery Veterans Administration Hospital Historic District |
| Montgomery Ward-Alabama Power Company Building |
| Montrose Historic District |
| Mooresville |
| Moor-Webb-Holmes Plantation |
| Morgan, John, House |
| Morris Avenue-First Avenue North Historic District |
| Morrison, James Arthur, House |
| Moulton Courthouse Square Historic District |
| Mountain Brook Estates Building |
| Mount Sinai School |
| Mount Sterling Methodist Church |
| Mount Zion Baptist Church |
| Mt. Olive Missionary Baptist Church No.1 |
| Murphey, Dr. William E., House |
| Murphy High School |
| Murphy House, The |
| Murphy, Samuel R., House |
| Nabers, Morrow and Sinnige, Building |
| Nectar Covered Bridge |
| Nelson House |
| Nettles, Isaac, Gravestones |
| Neutral Buoyancy Space Simulator |
| Neville House |
| New Decatur-Albany Historic District |
| New Hope Baptist Church |
| New Hope Rosenwald School |
| Newman, E.L., Lustron House |
| New Market Historic District |
| New Market Presbyterian Church |
| New Market United Methodist Church |
| Newton, Rev. Thomas, House |
| Nicholson House |
| Nitrate Village No. 1 Historic District |
| Noble Cottage |
| Noble Hall |
| Noble-McCaa-Butler House |
| Nonnenmacher Bakery |
| Nonnenmacher House |
| Norman, Felix Grundy, House |
| North Central Historic District |
| North Lakeview Industrial District |
| North Main Street Historic District |
| Northport Historic District |
| Northside Historic District |
| Norwood Historic District |
| Oakey Streak Methodist Episcopal Church |
| Oak Grove School |
| Oak Hill Cemetery |
| Oak Hill Historic District |
| Oakhurst |
| Oakleigh |
| Oaks, The |
| Oak Tree Cottage |
| Oates House |
| Old Athens, Alabama Main Post Office |
| Old Brick Presbyterian Church |
| Old Courthouse |
| Old Dauphin Way Historic District |
| Old Jail |
| Old Main and Church Street Historic District |
| Old Monroe County Courthouse |
| Old Observatory |
| Old Pell City Historic District |
| Old Ship African Methodist Episcopal Zion Church |
| Old Town Historic District |
| Old Tuscaloosa County Jail |
| Opp Commercial Historic District |
| Opp Cottage |
| Ordeman-Shaw Historic District |
| Orlando Apartments |
| Orrell House |
| Otey, William Madison, House |
Data from United States Park Service and Wikidata
