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- Mabank Independent School District
- Madisonville Consolidated Independent School District
- Magnolia Independent School District
- Malakoff Independent School District
- Malone Independent School District
- Malta Independent School District
- Manor Independent School District
- Mansfield Independent School District
- Marathon Independent School District
- Marble Falls Independent School District
- Marfa Independent School District
- Marion Independent School District
- Marlin Independent School District
- Marshall Independent School District
- Mart Independent School District
- Martin's Mill Independent School District
- Martinsville Independent School District
- Mason Independent School District
- Matagorda Independent School District
- Mathis Independent School District
- Maud Independent School District
- May Independent School District
- Maypearl Independent School District
- McAllen Independent School District
- McCamey Independent School District
- McDade Independent School District
- McGregor Independent School District
- McKinney Independent School District
- McLean Independent School District
- McLeod Independent School District
- McMullen County Independent School District
- Meadow Independent School District
- Medina Independent School District
- Medina Valley Independent School District
- Melissa Independent School District
- Memphis Independent School District
- Menard Independent School District
- Mercedes Independent School District
- Meridian Independent School District
- Merkel Independent School District
- Mesquite Independent School District
- Mexia Independent School District
- Meyersville Independent School District
- Miami Independent School District
- Midland Independent School District
- Midlothian Independent School District
- Midway Independent School District (Clay County)
- Midway Independent School District (McLennan County)
- Milano Independent School District
- Mildred Independent School District
- Miles Independent School District
- Milford Independent School District
- Miller Grove Independent School District
- Millsap Independent School District
- Mineola Independent School District
- Mineral Wells Independent School District
- Mission Consolidated Independent School District
- Monahans-Wickett-Pyote Independent School District
- Montague Independent School District
- Monte Alto Independent School District
- Montgomery Independent School District
- Moody Independent School District
- Moran Independent School District
- Morgan Independent School District
- Morgan Mill Independent School District
- Morton Independent School District
- Motley County Independent School District
- Moulton Independent School District
- Mount Calm Independent School District
- Mount Enterprise Independent School District
- Mount Pleasant Independent School District
- Mount Vernon Independent School District
- Muenster Independent School District
- Muleshoe Independent School District
- Mullin Independent School District
- Mumford Independent School District
- Munday Consolidated Independent School District
- Murchison Independent School District
Read more about this topic: List Of School Districts In Texas