| Hardin County CUSD 1, IL (District) |
| Hardin County ESC, OH (ISD) |
| Hardin County Schools, KY (District) |
| Hardin Elem, MT (District) |
| Hardin H S, MT (District) |
| Hardin ISD, TX (District) |
| Hardin Northern Local School District, OH (District) |
| Hardin-Central C-2, MO (District) |
| Hardin-Houston Local School District, OH (District) |
| Hardin-Jefferson ISD, TX (District) |
| Harding Co School District, SD (District) |
| Harding County, NM (ISD) |
| Harding Township, NJ (District) |
| Hardy County, WV (ISD) |
| Hardy County Schools, WV (District) |
