| Isanti County, MN (ISD) |
| Ishpeming Public Schools, MI (District) |
| Island City Academy, MI (PSA) |
| Island County, WA (ISD) |
| ISLAND HEIGHTS BOARD OF EDUCATION, NJ (District) |
| Island Park Charter School Inc., ID (PSA) |
| Island Park Union Free School District, NY (District) |
| Island Trees Union Free School District, NY (District) |
| Island Union Elementary, CA (District) |
| Isle Au Haut School Department, ME (District) |
| Isle Of Wight, VA (District) |
| Isle Public School District, MN (District) |
| Islesboro School Department, ME (District) |
| Islip Union Free School District, NY (District) |
| Issaquah School District, WA (District) |
