| Oakridge Public Schools, MI (District) |
| Oakridge Sd 76, OR (District) |
| Oaks-Mission, OK (District) |
| Oakside Prep Academy, MI (PSA) |
| Oakstone Community School, OH (PSA) |
| Oakville School District, WA (District) |
| Oakwood City School District, OH (District) |
| Oakwood CUSD 76, IL (District) |
| Oakwood ISD, TX (District) |
| Oasis Academy, MI (PSA) |
| Oberlin, KS (District) |
| Oberlin City School District, OH (District) |
| Oberon 16, ND (District) |
| Obion County, TN (ISD) |
| Obion County, TN (District) |
