| School | State | Tuition | Students | International Students | SAT | Type and Grade |
|---|---|---|---|---|---|---|
| La Scuola D Italia Guglielmo Marconi | -- | 250 | -- | -- | Grades Prekindergarten-12 | |
| The Laurel Hill School | -- | 403 | -- | -- | Grades Kindergarten-8 | |
| Learning Tree Multi-cultural | -- | 69 | -- | -- | Grades Kindergarten-8 | |
| Leptondale Christian Academy | $5,339 | 119 | -- | -- | Grades Prekindergarten-8 | |
| Lexington School For The Deaf | -- | 332 | -- | -- | Grades Prekindergarten - 12 | |
| Lima Christian School | $6,620 | 179 | -- | -- | Grades Kindergarten-12 | |
| Linden SDA School | -- | 238 | -- | -- | Grades Prekindergarten-8 | |
| Little River Community School | $5,037 | 45 | -- | -- | Grades Kindergarten-12 | |
| Living Word Academy | -- | 208 | -- | -- | Grades Prekindergarten-12 | |
| Long Island Lutheran Middle & High School | $66,900 | 455 | 8.13% | 1143 | 6-12 | |
| Long Island School For The Gifted | -- | 278 | -- | -- | Grades Prekindergarten-9 | |
| The Lowell School - High School Campus | -- | 128 | -- | -- | Grades 9-12 | |
| LREI (Little Red School House & Elisabeth Irwin High School) | $40,830 | 650 | 0.15% | -- | PreK-12 | |
| Lubavitcher Yeshiva | -- | 539 | -- | -- | Grades Kindergarten-9 | |
| Lutheran Elementary School Of Bay Ridge | -- | 193 | -- | -- | Grades Kindergarten-9 | |
| Lycee Francais De New York | $32,950 | 1288 | -- | -- | Grades Prekindergarten-12 | |
| Maimonides Hebrew Day School | -- | 113 | -- | -- | Grades Prekindergarten-12 | |
| Manlius Pebble Hill School | $28,980 | 329 | 9% | 1297 | PK-12 | |
| Maria Regina Elementary School | -- | 406 | -- | -- | Grades Prekindergarten-8 | |
| Maria Regina High School | $9,200 | 561 | -- | -- | Grades 9-12 |