| Hartford J1 School District, WI (District) |
| Hartford Public Schools, MI (District) |
| Hartford School District, CT (District) |
| Hartford School District, AR (District) |
| Hartford Uhs School District, WI (District) |
| Hartington Public Schools, NE (District) |
| Hartland Consolidated Schools, MI (District) |
| Hartland School District, CT (District) |
| Hartland-Lakeside J3 School District, WI (District) |
| Hartley County, TX (ISD) |
| Hartley ISD, TX (District) |
| Hartley-Melvin-Sanborn Comm School District, IA (District) |
| Harts Bluff ISD, TX (District) |
| Hartsburg Emden CUSD 21, IL (District) |
| Hartselle City, AL (District) |
