| Oliver-Mercer Special Ed Unit, ND (District) |
| Olivet Community Schools, MI (District) |
| Olmsted County, MN (ISD) |
| Olmsted Falls City School District, OH (District) |
| Olney Charter High School, PA (District) |
| Olney ISD, TX (District) |
| Olney-Bissell Elem, MT (District) |
| Olton ISD, TX (District) |
| Olustee, OK (District) |
| Olympia CUSD 16, IL (District) |
| Olympia School District, WA (District) |
| Omaha Public Schools, NE (District) |
| Omaha School District, AR (District) |
| Omak School District, WA (District) |
| Ombudsman Educational Services Ltd A Subsidiary Of Educati, AZ (District) |
