| 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) |
| Oak Park - River Forest SD 200, IL (District) |
| Oak Park ESD 97, IL (District) |
| Oak Park School District, MI (District) |
| Oak Park Unified, CA (District) |
| Oak Ridge, TN (District) |
