| 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) |
| Issaquena County, MS (ISD) |
| iSTEM Geauga Early College High School, OH (District) |
| Isthmus Montessori Academy Inc, WI (PSA) |
| Isthmus Montessori Academy Public, WI (PSA) |
