- Mary Chapel
- Marys Grove
- Maryville
- Mascot
- Mashburn
- Mason
- Mason Grove
- Mason Hall
- Mason Springs
- Massengill Island (historical)
- Massengill Mill
- Masseyville
- Match
- Matheny Grove
- Matlock Ford
- Matlock Island
- Matthew
- Maury City
- Maury Junction
- Maxey
- Maxwell
- May Acres
- Mayday
- Mayes Islands (historical)
- Mayland
- Maymead
- Maynardville
- Mays Subdivision
- Mayview Heights
- McAllister Hill