| Munster High School | - | Varsity | Medium | 0 | |
| Murphy High School | - | Varsity | Medium | 0 | |
| Murphy High School | - | Junior | Small | 0 | |
| Murrieta Mesa High School | - | Junior | - | 0 | |
| Murrieta Mesa High School | - | Varsity | Large | 0 | |
| Murrieta Valley High School | - | Varsity | - | 0 | |
| Murrieta Valley High School | - | - | - | 0 | |
| Muscle Shoals High School | - | Varsity | Small | 0 | |
| Muskingum University | - | - | - | 0 | |
| Mustang High School | - | Varsity | Large | 0 | |
| Mustang High School | - | Varsity | Large | 0 | |
| Myers Park High School | - | Junior | Small | 0 | |
| Myers Park High School | - | Varsity | Large | 0 | |
| Myrtle Beach High School | - | Varsity | Medium | 0 | |
| Myrtle Beach High School | - | Varsity | Small | 0 | |
| Napoleon High School | - | Varsity | - | 0 | |
| Nash Central High School | - | Varsity | Small | 0 | |
| Nature Coast Tech High School | - | Varsity | Large | 0 | |
| Nature Coast Tech High School | - | Varsity | Small | 0 | |
| Nature Coast Tech High School | - | Varsity | Small | 0 | |
| Navarro College | - | Junior | - | 0 | |
| Navarro High School | - | Varsity | Medium | 0 | |
| Nazareth Academy High School | - | Varsity | Small | 0 | |
| Nazareth Area High School | - | Varsity | - | 0 | |
| Nazareth Area High School | - | Varsity | Large | 0 | |
