| Business | Phone |
| Longwood Central School Dist 35 Yaphank Middle Island Rd, Middle Island 11953 | (631) 345-2820 |
| Longwood Junior High School 198 Longwood Rd, Middle Island 11953 | (631) 345-2700 |
| Longwood Middle School 41 Yaphank Middle Island Rd, Middle Island 11953 | (631) 345-2735 |
| Longwood Senior High School 100 Longwood Rd, Middle Island 11953 | (631) 345-9200 |
| West Middle Island Elem School 30 Swezey Ln, Middle Island 11953 | (631) 345-2755 |