- McCroskey Addition
- McGee
- McIntosh
- McKays Trailer Court
- McLaughlin
- Meadow
- Meadow View Addition
- Meckling
- Medary
- Medicine Island (historical)
- Melcore Acres Subdivision
- Melham
- Mellette
- Melrose Addition
- Menno
- Merritt
- Metzgerville
- Midland
- Midway
- Midway
- Midway
- Milbank
- Milbank Subdivision
- Milesville
- Millard
- Millboro
- Millbrook Colony
- Miller
- Miller Dale Colony
- Milltown