| Otwell Miller Academy, IN (District) |
| Ouachita County, AR (ISD) |
| Ouachita Parish, LA (ISD) |
| Ouachita Parish, LA (District) |
| Ouachita River School District, AR (District) |
| Ouachita School District, AR (District) |
| Ouachita Vocational Center, AR (District) |
| Our World Neighborhood 3, NY (PSA) |
| Our World Neighborhood Charter School, NY (PSA) |
| OUR WORLD NEIGHBORHOOD CS 2, NY (PSA) |
| Ouray County, CO (ISD) |
| Ouray R-1, CO (District) |
| OURSC, AR (ISD) |
| Outagamie, WI (ISD) |
| Outlook Academy, MI (PSA) |
