| Macomber, Enoch, House | 135 |
| Madden - Plantz House | 201 |
| Madison County | 37 |
| Maier, Francis, House | 222 |
| Maier, George M., House | 64 |
| Malone - Verstraete House | 197 |
| Manchester Dist. School | 100 |
| Manson, W. A., House | 153 |
| Mapes - Rex House | 97 |
| Marshall, Douglas, House | 224 |
| Marshall, Mich., Schoolhouse | 216 |
| Marsh, Theodore, House | 79 |
| Martin, John, House | 29 |
| Martin, Kenneth, House | 22 |
| Mason - Duste House | 167 |
| Masonic Lodge Bldg | 132 |
| Masonic Temple, Warsaw | 205 |
| Masons | 14, 15 |
| Maus - McEwing House | 225 |
| McDaniels - Hurtgam House | 78 |
| McEwen, Dr. Freeman, House | 109 |
| McGhee, James, House | 71 |
| McHale, Edward, House | 20 |
| McKecknie - Hanagan House | 178 |
| McKee, Gary, House | 192 |
| McKinney, John, House | 220 |
| McLaughlin House | 146 |
| McLeod House | 158 |
| McMurray, Lorne, House | 140 |
| McNall - Bush House | 82 |
| Meeker, Floyd, House | 197 |
| Mendon Academy | 58 |
| Mendon Dist. School #12 | 57 |
| Mendon Fire Department | 58 |
| Menzies, Stewart, House | 57 |
| Mercer, Kermit, House | 46 |
| Mercier, Raymond, House | 47 |
| Merrell, Harry, House | 80 |
| Merrell, Nathaniel, House | 46 |
| Merrick - Bartlett House | 181 |
|
| Merriman House | 91 |
| Messier, Robert, House and Barn | 140 |
| Method of laying | 7, 8 |
| Meulendyke, Oswald, House | 190 |
| Meyers, Philip, House | 22 |
| Michigan, State of | 212 |
| Middle Period | 4 |
| Middleton - Johncox House | 173 |
| Miller, George, House | 52 |
| Miller, Herbert, House | 77 |
| Miller - Seaman House | 49 |
| Millikin, James, House | 57 |
| Millville Quaker Church | 142 |
| Millville Schoolhouse | 142 |
| Minor - Trietley House | 28 |
| Minx, Raymond, House | 43 |
| Mitchell-Maus-McEwing House | 225 |
| Mogray, John, House | 198 |
| Molford - Behnke House | 132 |
| Moll, Adolph, House | 80 |
| Monar, Frederick, House | 190 |
| Monroe County | 40 |
| Morabito, Luigi, House | 110 |
| Morehouse, Lawrence, House | 203 |
| Morgan - Knop House | 34 |
| Morgan - Kraham House | 179 |
| Morgan, Thomas, House | 191 |
| Morrison - Garrison House | 168 |
| Morris - Traver House | 17 |
| Mortar | 12, 13 |
| Mortier, Camiel, House | 92 |
| Motley - Loomis House | 173 |
| Mott, Barlow, House | 65 |
| Mulligan, Edward D., House | 69 |
| Munn Schoolhouse | 162 |
| Munro House | 91 |
| Muntz, Charles, House | 75 |
| Murray Schoolhouse | 37 |
| Musshafen House | 175 |
|