| Mercer County, IL (ISD) |
| Mercer County, PA (ISD) |
| Mercer County Career Center, PA (District) |
| Mercer County Educational Service Center, OH (ISD) |
| Mercer County School District 404, IL (District) |
| Mercer County Schools, KY (District) |
| Mercer County Schools, NJ (ISD) |
| Mercer County Schools, WV (District) |
| Mercer County Special Services School District, NJ (District) |
| Mercer Island School District, WA (District) |
| Mercer School District, WI (District) |
| Merchantville School District, NJ (District) |
| Meredosia-Chambersburg CUSD 11, IL (District) |
| Meriden School District, CT (District) |
| Meridian CUSD 101, IL (District) |
