- Marquez
- Marshall Creek
- Mart
- Martindale
- Matador
- Mathis
- Mauriceville
- Morales Circle Colonia
- Morales Number 2 East Colonia
- Morales Number 2 West Colonia
- Morales Number 2A Colonia
- Morales Number 3 Colonia
- Maypearl
- McAllen
- McCamey
- Mayfield
- McKinney
- McLendon-Chisholm
- McQueeney
- Meadow
- Meadowlakes
- Meadows Place
- Megargel
- Menard
- Merkel
- Mertens
- Mertzon
- Mesquite
- Mexia
- Midland