| Ogle County, IL (ISD) |
| Oglesby ESD 125, IL (District) |
| Oglesby ISD, TX (District) |
| Oglethorpe County, GA (District) |
| Oglethorpe County, GA (ISD) |
| Ohio & Wabash Valley Reg Voc Sys, IL (District) |
| Ohio CCSD 17, IL (District) |
| Ohio CHSD 505, IL (District) |
| Ohio College Preparatory School, OH (PSA) |
| Ohio Connections Academy Inc, OH (PSA) |
| Ohio Construction Academy, OH (PSA) |
| Ohio County, KY (Phantom) |
| Ohio County, WV (ISD) |
| Ohio County, IN (ISD) |
| Ohio County Schools, WV (District) |
