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- Macks Creek R-V School District
- Macon County R-I School District
- Macon County R-IV School District
- Madison C-3 School District
- Malden R-I School District
- Malta Bend R-V School District
- Manes R-V School District
- Mansfield R-IV School District
- Maplewood-Richmond Heights School District
- Marceline R-V School District
- Maries County R-I School District
- Maries County R-II School District
- Marion C. Early R-V School District (Polk County)web site
- Marion County R-II School District
- Marionville R-IX School District (Lawrence County)
- Mark Twain R-VIII School District
- Marquand-Zion R-VI School District
- Marshall School District
- Marshfield R-I School District (Webster County)
- Maryville R-II School District
- Maysville R-I School District
- McDonald County R-I School District
- Meadow Heights R-II School District
- Meadville R-IV School District
- Mehlville R-IX School District (Saint Louis County) web site
- Meramec Valley R-III School District (http://www.mvr3.k12.mo.us/)
- Mexico 59 Public Schools (Audrain County)
- Miami R-I School District (Bates and Saline Counties)
- Mid-Buchanan County R-V School District
- Middle Grove C-1 School District
- Midway R-I School District
- Milan C-2 School District
- Miller County R-III School District
- Miller R-II School District (Lawrence County)
- Mirabile C-1 School District
- Missouri City 56 School District (Clay County)
- Moberly School District
- Monett R-I School District (Barry and Lawrence Counties)
- Moniteau County R-I School District
- Moniteau County R-V School District
- Monroe City R-I School District
- Montgomery County R-II School District (Montgomery County)
- Montrose R-XIV School District
- Morgan County R-I School District
- Morgan County R-II School District
- Mound City R-II School District
- Mount Vernon R-V School District (Lawrence County)
- Mountain Grove R-III School District
- Mountain View-Birch Tree R-III School District
Read more about this topic: List Of School Districts In Missouri