- Mayfield
- Mayflower
- Mayflower
- Mayhill
- Maynard
- Mayo
- Maypearl
- Mays Crossing
- Maysfield
- McAdoo
- McAdoo Acres Colonia
- McAllen
- McBride
- McCamey
- McCartney Island
- McCaulley
- McClanahan
- McClelland
- McColl Estates Colonia
- McCook
- McCoy
- McCoy
- McCoy
- McCoy
- McCoy, Atascosa
- McCracken Estates Colonia
- McCroskey
- McDade
- McDaniel Addition Colonia
- McDaniel Colonia