| Maria Regina High School | - | Varsity | Small | 0 | |
| Marlboro High School | - | Varsity | Small | 0 | |
| Marlboro High School | - | Varsity | Small | 0 | |
| Marple-Newtown High School | - | Varsity | Large | 0 | |
| Marple-Newtown High School | - | Varsity | Large | 0 | |
| Marquette High School | - | Junior | - | 0 | |
| Marquette High School | - | Varsity | Small | 0 | |
| Martinsburg High School | - | Varsity | Medium | 0 | |
| Marvin Ridge High School | - | Varsity | Large | 0 | |
| Mary G Montgomery High School | - | Varsity | Large | 0 | |
| Maryland Dance Energy | - | Senior | Large | 0 | |
| Maryland Dance Energy | - | Youth | Large | 0 | |
| Maryland Dance Energy | - | Mini | Large | 0 | |
| Maryland Marlins All-Stars | L5 | Senior | Large | 0 | |
| Maryland Marlins All-Stars | L5 | Senior | Large | 0 | |
| Maryland Twisters | - | - | Large | 0 | |
| Maryland Twisters Virginia | L5 | Senior | Medium | 0 | |
| Maryland Twisters Virginia | L4 | Senior | Small | 0 | |
| Marysville High School | - | Varsity | Medium | 0 | |
| Marysville High School | - | Varsity | Large | 0 | |
| Massapequa High School | - | Junior | - | 0 | |
| Massapequa High School | - | Varsity | Large | 0 | |
| Massapequa High School | - | Varsity | - | 0 | |
| MaST Community Charter School III | - | Varsity | Large | 0 | |
| Mayde Creek High School | - | Varsity | Large | 0 | |
| Mayde Creek High School | - | Varsity | Large | 0 | |
| Mayde Creek High School | - | Varsity | Medium | 0 | |
| McAllen High School | - | Varsity | Large | 0 | |
| McAllen High School | - | Varsity | Large | 0 | |
| McAllen High School | - | Varsity | Large | 0 | |
| McAllen Memorial High School | - | Varsity | Medium | 0 | |
| McCracken County High School | - | Varsity | Large | 0 | |
| McCracken County High School | - | Varsity | Medium | 0 | |
| McCracken County High School | - | Varsity | Large | 0 | |
| McCreary County Middle | - | Junior | Large | 0 | |
| McDowell High School | - | Varsity | Large | 0 | |
| McKendree University | - | - | Large | 0 | |
| McKinney High School | - | Varsity | Large | 0 | |
| McKinney High School | - | Varsity | Small | 0 | |
| McLean County High School | - | Varsity | Large | 0 | |
| McLean Middle School | - | - | Large | 0 | |
| McMinnville High School | - | - | Large | 0 | |
| McNeil High School | - | Varsity | Large | 0 | |
| MCPD Cheer and Dance | L3 | U16 | Large | 0 | |
| Mead High School | - | Varsity | Large | 0 | |
| Mead High School | - | - | Large | 0 | |
| Mead High School | - | - | Large | 0 | |
| Meade County High School | - | Varsity | Large | 0 | |
| Meadowlands Starz | L4 | - | - | 0 | |
| Meadowlands Starz | L1 | - | Large | 0 | |
| Medellin All Stars | L5 | International Open | Large | 0 | |
| Medina Valley High School | - | Varsity | Large | 0 | |
| Melissa High School | - | Junior Varsity | Large | 0 | |
| Memphis Elite | L3 | Senior | Large | 0 | |
| Mepham High School | - | Varsity | Small | 0 | |
| Mepham High School | - | Varsity | Large | 0 | |
| Mepham High School | - | Varsity | Large | 0 | |
| Mepham High School | - | Varsity | Large | 0 | |
| Mepham High School | - | Varsity | Large | 0 | |
| Mesa High School | - | - | Large | 0 | |
| Mesa High School | - | - | Small | 0 | |
| Mesa High School | - | - | Large | 0 | |
| Mesquite High School | - | Varsity | Large | 0 | |
| Metcalfe County High School | - | Varsity | Large | 0 | |
| MGA Cheer Extreme | L6 | Senior | Large | 0 | |
| Miami Elite | L5 | Senior | Large | 1 | |
| Miamisburg High School | - | Varsity | - | 0 | |
| Middle College High School | - | Varsity | Large | 0 | |
| Middle Tenn Christian High School | - | Varsity | Large | 0 | |
| Middle Tenn Christian High School | - | Junior | - | 0 | |
| Middle Tenn Christian High School | - | Varsity | Large | 0 | |
| Middle Tenn Christian High School | - | Varsity | Large | 0 | |
| Middle TN Christian School | - | Junior | Small | 0 | |
| Middle TN Christian School | - | Junior | - | 0 | |
| MIDTN Cheer Ignite | L2 | - | - | 0 | |
| MIDTN Cheer Ignite | L1 | - | Large | 0 | |
| Midwest Cheer Elite | L6 | Senior | Small | 0 | |
| Midwest Cheer Elite | L3 | Youth | - | 0 | |
| Midwest Cheer Elite (Main) | L5 | Senior | Large | 0 | |
| Milford High School | - | Varsity | Large | 0 | |
| Milford High School | - | Varsity | Large | 0 | |
| Milford High School | - | Varsity | Large | 0 | |
| Mill Valley High School | - | Varsity | Large | 0 | |
| Mill Valley High School | - | Varsity | Large | 0 | |
| Millard North High School | - | Varsity | Small | 0 | |
| Millard North High School | - | Varsity | Large | 0 | |
| Millennium All Stars | L5 | International Open | Large | 0 | |
| Millikin University | - | Open | Large | 0 | |
| Mills Park Middle School | - | Junior | Small | 0 | |
| Milpitas High School | - | Varsity | Large | 0 | |
| Mira Costa High School | - | Varsity | Large | 0 | |
| Mira Costa High School | - | Varsity | Medium | 0 | |
| Mize Attendance Center | - | Varsity | - | 0 | |
| Mizutori Sports Club | L7 | International Open | Large | 0 | |
| Modern American Cheer | L1 | Youth | Large | 0 | |
| Modern American Cheer | L2 | Junior | Small | 0 | |
| Modern American Cheer | L3 | Senior | Large | 0 | |
| Monsignor Edward Pace High School | - | - | Large | 0 | |
| Monsignor Edward Pace High School | - | Varsity | Large | 0 | |
| Monsignor Edward Pace High School | - | Varsity | Large | 0 | |
