| Oneida City School District, NY (District) |
| Oneida County, ID (ISD) |
| Oneida County, NY (ISD) |
| Oneida County District, ID (District) |
| Oneida Township S/D #3, MI (District) |
| Oneida-Herkimer-Madison Boces, NY (ISD) |
| Onekama Consolidated Schools, MI (District) |
| Oneonta City, AL (District) |
| Oneonta City School District, NY (District) |
| Onion Creek School District, WA (District) |
| Onondaga Central School District, NY (District) |
| Onondaga County, NY (ISD) |
| Onondaga-Cortland-Madison Boces, NY (ISD) |
| Onslow County, NC (ISD) |
| Onslow County Schools, NC (District) |
