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Hennessey School District
- Hennessey Lower Elementary School Calendar
- Hennessey High School Calendar
- Hennessey Upper Elementary School Calendar
Other districts in Oklahoma state
- Hammon School District
- Healdton School District
- Hartshorne School District
- Henryetta School District
- Hinton School District
- Hilldale School District
- Hollis School District
- Haworth School District
- Holly Creek School District
- Hooker School District
- Hydro-Eakly School District
- Hugo School District
- Haywood School District
- Harmony School District
- Hanna School District