| Ozark High School Junior Varsity | CG: Scholastic Regional A | Theresa Walls | MO |
| Odessa Middle School | CG: Scholastic Middle School | Kyra Keuck | MO |
| Odessa High School | CG: Scholastic A | Rebecca Westmoreland | MO |
| Odessa High School | Perc: Scholastic Regional | Jeremy Meyer | MO |
| Obsidian of Central Missouri | CG: Independent Open | Rachelle Pritchard | MO |
| Oakland Middle School | CG: Scholastic Middle School | Christina Thalhuber | MO |
| Oak Park High School | CG: Scholastic Regional A | Riley Wartick | MO |
| O'Fallon Township Jr. High School | CG: Independent Regional A | Daniel Bertram | IL |
| O'Fallon Township High School JV | CG: Scholastic Regional A | Daniel Bertram | IL |
| O'Fallon Township High School | CG: Scholastic A | Daniel Bertram | IL |
| Northwest High School Regional | CG: Scholastic Regional A | Brett Dunsford | MO |
| Northwest High School Novice | CG: Scholastic Novice | Brett Dunsford | MO |
| North Kansas City High School | CG: Scholastic Regional A | Christi Mills | MO |
| Nixa Junior High School | CG: Scholastic Middle School | Craig Finger | MO |
| Nixa High School | CG: Scholastic A | Craig Finger | MO |
| National Avenue | CG: Independent A | John Sullivan | MO |
| Mosaic | CG: Independent Regional A | Lisa Carson | KS |
| Moreland Ridge Middle School | CG: Scholastic Middle School | Amanda White | MO |
| Modulation Z | Perc: Independent A | Ryan Treasure | MO |
| Missouri Western State University Golden Griffons | CG: Independent Regional A | Corey Naeger | MO |
| Mid-Buchanan Middle School | CG: Scholastic Middle School | Kim Privat | MO |
| Mid-Buchanan High School | CG: Scholastic Regional A | Kim Privat | MO |
| Maysville | CG: Scholastic B | Dana Walling | MO |
| Mattoon High School | CG: Scholastic Regional A | Angi Black | IL |
| Mater Dei High School | Perc: Scholastic A | Mathew Murphy | IL |
| Mascoutah HS | CG: Scholastic B | Jo smith | IL |
| Maryville High School | CG: Scholastic Regional A | Kylie Mattke | MO |
| Marquette High School | CG: Scholastic C | Melissa Zemann | MO |
| Majestic Independent Winter Guard | CG: Independent A | Christina Thalhuber | MO |
| Lindbergh School District | CG: Scholastic Middle School | James Hutson | MO |
| Lindbergh High School | CG: Scholastic B | Sheryl Silverberg | MO |
| Liberty North High School | CG: Scholastic Regional A | Amy Hall | MO |
| Liberty High School | CG: Scholastic Regional A | Amber Hess | MO |
| Lee's Summit West High School | CG: Scholastic B | Madison King | MO |
| Lee's Summit North High School Winter Guard | CG: Scholastic Regional A | Scott Kuhlman | Missouri |
| Lee's Summit High School | Perc: Scholastic A | Mike McBain | MO |
| Lee's Summit High School | CG: Scholastic Regional A | Laura Finch | MO |
| Lawson High School | CG: Scholastic C | Kristy Humbard | MO |
| Lathrop High School | CG: Scholastic Regional A | Erin Holliway | MO |
| Laquey High School | Perc: Scholastic Concert | Doug Schaffer | MO |
| Laquey High School | CG: Scholastic Regional A | Doug Schaffer | MO |
| Lafayette HS | CG: Scholastic A | Evan Coonrod | MO |
| Lafayette County C-1 High School | CG: Scholastic Regional A | Joseph Spencer | MO |
| Kickapoo HS Emulation | CG: Scholastic A | Sherri Peterson | MO |
| Kickapoo HS | Perc: Scholastic Open | TROY PETERSON | MO |
| Kickapoo Gold | CG: Scholastic B | Sherri Peterson | MO |
| Joplin High School | CG: Scholastic C | Christina Leonard | MO |
| Joplin High School | Perc: Scholastic B | Mike Wassenaar | MO |
| Illinois Valley Central | Perc: Scholastic Regional | Aaron Mills | IL |
| Hollister High School | Perc: Scholastic Regional | Nathan Spurling | MO |
