- Macs Corner
- Madison
- Madra
- Madsen Beach
- Mahto
- Maitland
- Manchester
- Manderson
- Manderson-White Horse Creek
- Manhattan Island
- Mansfield
- Maple Leaf
- Marcus
- Marietta
- Marion
- Marion Island (historical)
- Marksville
- Marlow
- Marthas Island (historical)
- Martin
- Martindale Addition
- Marty
- Marvin
- Maurice
- Maurine
- Mawl Springs
- Maxwell Colony
- Mayfield
- Mayfield Colony
- McCook Lake