| Oak Grove, OK (District) |
| Oak Grove Elementary, CA (District) |
| Oak Grove R-Vi, MO (District) |
| Oak Grove SD 68 Bartonville, IL (District) |
| Oak Grove SD 68 Green Oaks, IL (District) |
| Oak Grove Union Elementary, CA (District) |
| Oak Harbor School District, WA (District) |
| Oak Hill Montessori Community School, MN (PSA) |
| Oak Hill R-I, MO (District) |
| Oak Hill Union Local School District, OH (District) |
| Oak Hill United School Corp, IN (District) |
| Oak Hills Local School District, OH (District) |
| Oak Land Vocational Cooperatve, MN (District) |
| Oak Lawn CHSD 229, IL (District) |
| Oak Lawn-Hometown SD 123, IL (District) |
