| Opp City, AL (District) |
| Oppenheim Ephratah, NY (DISTRICT) |
| Oppenheim-ephratah-st. Johnsville Csd, NY (District) |
| Opportunity Charter School, NY (PSA) |
| Optima, OK (District) |
| Options Charter Sch - Noblesville, IN (District) |
| Options Charter School - Carmel, IN (District) |
| Oquirrh Mountain Charter School, UT (PSA) |
| Oracle Charter School, NY (PSA) |
| Oracle Elementary District, AZ (District) |
| ORADELL SCHOOL DISTRICT, NJ (District) |
| Oran R-Iii, MO (District) |
| Orange, FL (District) |
| Orange, VA (District) |
| Orange, MA (District) |
