- Mace
- Mackey Place
- Madrid
- Madrone
- Maez Place
- Magdalena
- Magic Valley
- Malaga
- Maljamar
- Malpais
- Mangas
- Mangas Springs
- Manuelitas
- Manuelito
- Manuelito Place
- Manzano
- Manzano Springs
- Marcia
- Marcia Ranch
- Mariano Lake
- Marmon
- Marquez
- Martin Place
- Martin Place
- Martinez
- Martinez Town
- Mastodon
- Matthew Place
- Maxon
- Maxwell