| Okanogan School District, WA (District) |
| Okarche, OK (District) |
| Okaw Area Vocational Center, IL (District) |
| Okaw Regional Voc System, IL (District) |
| Okaw Valley CUSD 302, IL (District) |
| Okay, OK (District) |
| Okeechobee, FL (District) |
| Okeechobee County, FL (ISD) |
| Okeene, OK (District) |
| Okemah, OK (District) |
| Okemos Public Schools, MI (District) |
| Okfuskee County, OK (ISD) |
| Oklahoma City, OK (District) |
| Oklahoma County, OK (ISD) |
| Oklahoma Department of Education, OK (State) |
