| Otis School Department, ME (District) |
| Otis-Bison, KS (District) |
| Otoe County, NE (ISD) |
| Otsego County, NY (ISD) |
| Otsego Local School District, OH (District) |
| Otsego Public Schools, MI (District) |
| Otsego-Delaw-Schoharie-Greene Boces, NY (ISD) |
| Ottawa, KS (District) |
| Ottawa Area ISD, MI (ISD) |
| Ottawa County, OK (ISD) |
| Ottawa County, KS (ISD) |
| Ottawa ESD 141, IL (District) |
| Ottawa Glandorf Local School District, OH (District) |
| Ottawa Hills Local School District, OH (District) |
| Ottawa Twp HSD 140, IL (District) |
