Indiana - Role: Building
| Melodeon Hall |
| Merchants National Bank and Annex |
| Merit-Tandy Farmstead |
| Merom-Gill Township Carnegie Library |
| Merrifield-Cass House |
| Messick Masonic Temple |
| Meyer, Dr. John and Gerda, House |
| Meyer, Joseph Ernest, House |
| M. Fine & Sons Building |
| Miami County Courthouse |
| Michael, Enos, House |
| Michigan City Lighthouse |
| Michigan City Post Office |
| Michigan Road Toll House |
| Milan Masonic Lodge No. 31 |
| Milford, Marshall M., House |
| Milisen, Dr. Robert L. and Ellen, House |
| Millen-Chase-McCalla House |
| Millen House |
| Miller, Arthur, House |
| Miller House |
| Miller-Parrott Baking Company Building |
| Miller Town Hall |
| Millikan, Lovel D., House |
| Mishawaka Carnegie Library |
| Mishawaka Fire Station No. 4 |
| Mishawaka Reservoir Caretaker's Residence |
| Mitchell, Joseph, House |
| Mitchell Opera House |
| Mock School |
| Moffett-Ralston House |
| Mohr, Louis, Block |
| Monon Park Dancing Pavillion |
| Monroe Carnegie Library |
| Monroe County Courthouse |
| Mont Clair |
| Monteith, Mark L. and Harriet E., House |
| Montgomery County Jail and Sheriff's Residence |
| Montgomery, T. Harlan and Helen, House |
| Montgomery Ward Building |
| Monticello Carnegie Library |
| Montpelier Carnegie Library |
| Moore/Carlew Building |
| Moore's Hill United Methodist Church |
| Mooresville Friends Academy Building |
| Mooresville Gymnasium |
| Moore, Thomas, House |
| Moore-Youse-Maxon House |
| Morehouse, Levi and Lucy, Farm |
| Morey House |
| Morey-Lampert House |
| Morgan County Courthouse |
| Morgan County Sheriff's House and Jail |
| Morgan House |
| Morgan-Skinner-Boyd Homestead |
| Morris-Butler House |
| Morrison Block (M. O'Connor Grocery Wholesalers) |
| Morrison, Francis H., House |
| Morton, Oliver P., House |
| Morton School |
| Mount Pleasant Beech Church and Beech Cemetery |
| Mountz House |
| Mount Zion Methodist Episcopal Church |
| Mt. Pisgah Lutheran Church |
| Muncie Public Library |
| Muncie Trade School |
| Murray Theater |
| Myrtle Fern |
| Nappanee West Park and Pavilion |
| National City Bank |
| Neely House |
| Nelson, F.P., House |
| Nester House |
| New Albany-Floyd County Public Library |
| Newberry Friends Meeting House |
| Newby, Micah, House |
| New Goshen District No. 2 School |
| Newkirk Mansion |
| Newman, M. G., Building |
| Newsom-Marr Farm |
| Newton County Courthouse |
| New York Central Railroad Passenger Depot |
| Nichols, Charles E., House |
| Nichols, J.L., House and Studio |
| Nicholson, Andrew, Farmstead |
| Nicholson-Rand House |
| Niewerth Building |
| Ninde-Mead-Farnsworth House |
| Noble County Courthouse |
| Noble County Sheriff's House and Jail |
| Noblesville Milling Company Mill |
| Noftzger-Adams House |
| Normal Hall |
| North Christian Church |
| Northern States Life Insurance Company |
| North Manchester Public Library |
| North Pumping Station |
| Norton, C. S., Mansion |
| Nowels, David & Sarah, House |
| Oakdale School |
Data from United States Park Service and Wikidata
