| Mt. Clemens Montessori Academy, MI (PSA) |
| Mt. Diablo Unified, CA (District) |
| Mt. Ephraim, NJ (District) |
| Mt. Healthy City School District, OH (District) |
| Mt. Healthy Preparatory and Fitness Academy, OH (PSA) |
| Mt. Morris Consolidated Schools, MI (District) |
| Mt. Pleasant City School District, MI (District) |
| Mt. Shasta Union Elementary, CA (District) |
| Mt. Vernon R-V, MO (District) |
| Mt. Vernon/Enola School Dist., AR (District) |
| Muckleshoot Indian Tribe, WA (District) |
| Muenster ISD, TX (District) |
| Muhlenberg County, KY (Phantom) |
| Muhlenberg County Schools, KY (District) |
| Muhlenberg SD, PA (District) |
