| 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 (District) |
| Obion County, TN (ISD) |
| Oblong CUSD 4, IL (District) |
| Ocean Beach School District, WA (District) |
| OCEAN CITY SCHOOL DISTRICT, NJ (District) |
| Ocean County Schools, NJ (ISD) |
| Ocean County Vocational Technical School, NJ (District) |
