| Omaha Christian Academy | - | Varsity | - | 0 | | |
| Omaha North High School | - | Varsity | Medium | 0 | | |
| Onalaska High School | - | Varsity | Medium | 0 | | |
| Oneonta High School | - | Varsity | Medium | 0 | | |
| Oneonta High School | - | Varsity | Medium | 0 | | |
| Opp High School | - | Varsity | Medium | 0 | | |
| Opp High School | - | Varsity | Medium | 0 | | |
| Opp High School | - | Varsity | Small | 0 | | |
| Opp High School | - | Varsity | Small | 0 | | |
| Opp High School | - | Varsity | Large | 0 | | |
| Opp High School | - | Varsity | - | 0 | | |
| Orange High School | - | Varsity | Large | 0 | | |
| Orange High School | - | - | - | 0 | | |
| Orange High School | - | Varsity | Large | 0 | | |
| Orange High School | - | Varsity | Small | 0 | | |
| Orange High School | - | Varsity | Small | 0 | | |
| Orange High School | - | Varsity | - | 0 | | |
| Orange High School | - | Varsity | - | 0 | | |
| Orange High School | - | Varsity | Small | 0 | | |
| Orange Lutheran High School | - | Varsity | Large | 0 | | |
| Orange Lutheran High School | - | Varsity | Medium | 0 | | |
| Orange Lutheran High School | - | Varsity | Small | 0 | | |
| Orangefield High School | - | Varsity | Large | 0 | | |
| Orem High School | - | Varsity | - | 0 | | |
| Orem High School | - | Varsity | - | 0 | | |
| Organ Mountain High School | - | Varsity | Large | 0 | | |
| Organ Mountain High School | - | Varsity | Large | 0 | | |
| Orland High School | - | Varsity | Large | 0 | | |
| Orland High School | - | Varsity | Medium | 0 | | |
| Orland High School | - | Varsity | - | 0 | | |
| Oroville High School | - | Varsity | Medium | 0 | | |
| Oroville High School | - | Varsity | - | 0 | | |
| Osbourn Park High School | - | Varsity | Medium | 0 | | |
| Osseo High School | - | Varsity | - | 0 | | |
| Ossining High School | - | Varsity | Large | 0 | | |
| Otay Ranch High School | - | Varsity | Small | 0 | | |
| Otsego High School | - | Varsity | Small | 0 | | |
| Otsego High School | - | Varsity | Small | 0 | | |
| Ouachita Parish High School | - | Varsity | - | 0 | | |
| Ouachita Parish High School | - | Varsity | Medium | 0 | | |
| Our Lady Academy | - | Varsity | Large | 0 | | |
| Our Lady Academy | - | Varsity | - | 0 | | |
| Our Lady Academy | - | Varsity | - | 0 | | |
| Our Lady Academy | - | Varsity | - | 0 | | |
| Our Lady Academy | - | Junior Varsity | - | 0 | | |
| Our Lady Of Lourdes Academy | - | Varsity | Medium | 0 | | |
| Our Lady Of Lourdes Academy | - | Junior Varsity | - | 0 | | |
| Our Lady Of Lourdes Academy | - | Varsity | - | 0 | | |
| Our Lady Of Lourdes Academy | - | Varsity | Small | 0 | | |
| Our Lady Of Lourdes Academy | - | Varsity | Small | 0 | | |