| Mariana Bracetti Academy Cs, PA (PSA) |
| Maricopa County, AZ (ISD) |
| Maricopa County Community College District Dba Gateway Early, AZ (District) |
| Maricopa County Regional District, AZ (District) |
| Maricopa County Regional Special Services District, AZ (District) |
| Maricopa County Sheriffs Office, AZ (District) |
| Maricopa Unified, CA (District) |
| Maricopa Unified School District, AZ (District) |
| Mariemont City School District, OH (District) |
| Maries Co. R-I, MO (District) |
| Maries Co. R-Ii, MO (District) |
| Maries County, MO (ISD) |
| Marietta, OK (District) |
| Marietta City, GA (District) |
| Marietta City School District, OH (District) |
