| Oyster River Sau Office, NH (District) |
| Oysterponds Union Free School District, NY (District) |
| Ozark City, AL (District) |
| Ozark County, MO (ISD) |
| Ozark Montessori Academy Springdale, AR (PSA) |
| Ozark Mountain School District, AR (District) |
| Ozark R-Vi, MO (District) |
| Ozark School District, AR (District) |
| Ozark Technical College, MO (District) |
| Ozaukee, WI (ISD) |
| P.L.C. Charter Schools, AZ (PSA) |
| PA IU 01, PA (ISD) |
| PA IU 02, PA (ISD) |
| PA IU 03, PA (ISD) |
| PA IU 04, PA (ISD) |
