| St Joseph School | 1.5 |
Regular elementary or secondary | Pre-KG-8 | 186 | 12.5 | Roman Catholic |
| St Patrick Elementary School | 3.6 |
Regular elementary or secondary | Pre-KG-8 | 441 | 17.9 | Roman Catholic |
| Ca Montessori Children's Center | 3.7 |
Early childhood program/child care center | Pre-KG-KG | 16 | 4.6 | Nonsectarian |
| Kids Place Early Childhood Day School | 4.0 |
Montessori | Pre-KG-KG | 11 | 11.0 | Nonsectarian |
| Sts Philip And James School | 4.0 |
Regular elementary or secondary | Pre-KG-8 | 284 | 15.3 | Roman Catholic |
| Harbor Country Day School | 4.4 |
Regular elementary or secondary | Pre-KG-8 | 120 | 8.6 | Nonsectarian |
| Kiddie Academy E Setauket | 4.4 |
Early childhood program/child care center | Pre-KG-KG | 14 | 14.0 | Nonsectarian |
| Tutor Time | 4.5 |
Early childhood program/child care center | Pre-KG-KG | 8 | 8.0 | Nonsectarian |
| Montessori School Of Selden | 4.7 |
Early childhood program/child care center | Pre-KG-KG | 7 | 7.0 | Nonsectarian |
| Ivy League School | 4.9 |
Regular elementary or secondary | Pre-KG-5 | 76 | 8.8 | Nonsectarian |
| Our Lady Of Providence Regional School | 5.9 |
Regular elementary or secondary | Pre-KG-8 | 280 | 17.5 | Roman Catholic |
| North Shore Christian School | 6.1 |
Regular elementary or secondary | Pre-KG-8 | 108 | 5.7 | Baptist |
| North Shore Montessori | 6.1 |
Montessori | Pre-KG-KG | 19 | 4.8 | Nonsectarian |
| Prince Of Peace Regional School | 7.2 |
Regular elementary or secondary | Pre-KG-8 | 172 | 11.6 | Roman Catholic |
| St Elizabeth | 7.3 |
Regular elementary or secondary | Pre-KG-8 | 212 | 19.6 | Roman Catholic |
| Emanuel Lutheran School | 7.3 |
Regular elementary or secondary | Pre-KG-8 | 113 | 8.5 | Lutheran Church - Missouri Synod |
| Holy Angels Regional School | 7.4 |
Regular elementary or secondary | KG-8 | 385 | 16.8 | Roman Catholic |
| Our Lady Of Wisdom Regional School | 7.5 |
Regular elementary or secondary | KG-8 | 219 | 15.8 | Roman Catholic |
| West Sayville Christian School | 7.6 |
Regular elementary or secondary | KG-8 | 74 | 6.8 | Christian (no specific denomination) |
| Jkl Montessori School | 8.2 |
Montessori | Pre-KG-Trans. KG | 3 | 0.5 | Nonsectarian |
| St Mary School | 8.7 |
Regular elementary or secondary | Pre-KG-8 | 426 | 12.5 | Roman Catholic |
| Holy Family Regional School | 8.7 |
Regular elementary or secondary | Pre-KG-8 | 317 | 12.9 | Roman Catholic |
| Ebenezer Christian Academy | 9.2 |
Regular elementary or secondary | Pre-KG-4 | 53 | 13.2 | Assembly of God |
| Mdq Academy | 9.7 |
Regular elementary or secondary | Pre-KG-3 | 51 | 7.3 | Islamic |
| Solomon Schechter Day School | 9.8 |
Regular elementary or secondary | KG-8 | 55 | 3.6 | Jewish |
| Step By Step Early Learning Center | 10.0 |
Montessori | Pre-KG-Trans. KG | 11 | 5.5 | Nonsectarian |
| Heritage Baptist Church | 10.5 |
Regular elementary or secondary | Pre-KG-3 | 16 | 4.0 | Christian (no specific denomination) |
| Trinity Regional School-east Newport Campus | 11.2 |
Regular elementary or secondary | KG-8 | 476 | 17.4 | Roman Catholic |
| Bay Shore Christian School | 11.4 |
Regular elementary or secondary | Pre-KG-3 | 32 | 10.7 | Assembly of God |
| St Pauls Lutheran School | 11.6 |
Regular elementary or secondary | Pre-KG-3 | 118 | 11.9 | Evangelical Lutheran Church in America |
| St Patrick School | 11.9 |
Regular elementary or secondary | Pre-KG-8 | 369 | 16.5 | Roman Catholic |
| St Peter S By-the-sea Day School | 12.0 |
Regular elementary or secondary | Pre-KG-7 | 113 | 6.6 | Episcopal |
| Our Lady Of Lourdes School | 12.6 |
Regular elementary or secondary | Pre-KG-8 | 248 | 16.4 | Roman Catholic |
| Ss Cyril And Methodius School | 12.7 |
Regular elementary or secondary | Pre-KG-8 | 232 | 12.6 | Roman Catholic |
| Love Of Learning Montessori-dix Hills Campus | 14.3 |
Montessori | Pre-KG-4 | 67 | 8.8 | Nonsectarian |
| Love Of Learning Montessori | 14.3 |
Montessori | Pre-KG-4 | 64 | 8.4 | Nonsectarian |
| Babylon Christian School | 14.7 |
Regular elementary or secondary | Pre-KG-5 | 53 | 6.8 | Presbyterian |
| South Bay Jr Academy Of Sda | 15.0 |
Regular elementary or secondary | Pre-KG-8 | 46 | 15.3 | Seventh-Day Adventist |
| Kindercare Learning Center-huntington | 15.3 |
Early childhood program/child care center | Pre-KG-KG | 10 | 10.0 | Nonsectarian |
| St Patrick's School | 16.8 |
Regular elementary or secondary | Pre-KG-8 | 648 | 19.1 | Roman Catholic |
| Our Lady Queen Of Apostles Reg Catholic School | 17.2 |
Regular elementary or secondary | Pre-KG-8 | 205 | 13.1 | Roman Catholic |
| Our Lady Of Perpetual Help School | 17.3 |
Regular elementary or secondary | Pre-KG-8 | 291 | 12.9 | Roman Catholic |
| The Hobbits Castle | 17.4 |
Regular elementary or secondary | Pre-KG-2 | 10 | 5.0 | Nonsectarian |
| West Hills Montessori School | 17.5 |
Montessori | Pre-KG-6 | 23 | 2.5 | Nonsectarian |
| Msl-montessori School | 17.8 |
Montessori | Pre-KG-5 | 34 | 6.3 | Nonsectarian |
| Miss Sue's Nursery School And Kindergarten | 18.8 |
Early childhood program/child care center | Pre-KG-Trans. KG | 4 | 3.1 | Nonsectarian |
| St John Baptist De Lasalle Regional School | 18.9 |
Regular elementary or secondary | Pre-KG-8 | 255 | 17.5 | Roman Catholic |
| Hanc-hebrew Academy Of Nassau County | 19.4 |
Regular elementary or secondary | Pre-KG-6 | 150 | 10.8 | Jewish |
| Our Lady Of Lourdes School | 19.4 |
Regular elementary or secondary | Pre-KG-8 | 171 | 13.4 | Roman Catholic |
| St Martin Of Tours School | 19.4 |
Regular elementary or secondary | Pre-KG-8 | 374 | 14.8 | Roman Catholic |
| Good Shepherd Lutheran School | 19.6 |
Early childhood program/child care center | Pre-KG-KG | 11 | 11.0 | Evangelical Lutheran Church in America |
| Hickory Hill | 19.6 |
Early childhood program/child care center | Pre-KG-KG | 18 | 18.0 | Nonsectarian |
| Montessori Children's School Of Plainview | 20.1 |
Montessori | Pre-KG-KG | 8 | 8.0 | Nonsectarian |
| Greentrees Country Day School | 20.4 |
Early childhood program/child care center | Pre-KG-KG | 7 | 2.1 | Nonsectarian |
| St Edward Confessor School | 20.4 |
Regular elementary or secondary | Pre-KG-8 | 198 | 13.8 | Roman Catholic |
| Our Lady Of Mercy School | 20.9 |
Regular elementary or secondary | Pre-KG-8 | 438 | 16.3 | Roman Catholic |
| Grace Day School | 21.8 |
Regular elementary or secondary | Pre-KG-8 | 214 | 9.2 | Episcopal |
| Solomon Schechter Day School Of Nassau County | 21.8 |
Regular elementary or secondary | KG-5 | 239 | 9.4 | Jewish |
| St Dominic Elementary School | 21.9 |
Regular elementary or secondary | Pre-KG-8 | 209 | 11.0 | Roman Catholic |
| St Ignatius Loyola School | 21.9 |
Regular elementary or secondary | Pre-KG-8 | 220 | 16.4 | Roman Catholic |
| Maria Regina Elementary School | 22.0 |
Regular elementary or secondary | Pre-KG-8 | 421 | 15.6 | Roman Catholic |
| Raynor Country Day School | 22.0 |
Regular elementary or secondary | Pre-KG-6 | 97 | 3.4 | Nonsectarian |
| Trinity Lutheran School | 22.2 |
Regular elementary or secondary | Pre-KG-8 | 381 | 15.3 | Lutheran Church - Missouri Synod |
| Holy Family School | 22.6 |
Regular elementary or secondary | Pre-KG-8 | 437 | 22.9 | Roman Catholic |
| St William The Abbot School | 22.8 |
Regular elementary or secondary | Pre-KG-8 | 519 | 22.1 | Roman Catholic |
| The Maria Montessori School | 23.4 |
Montessori | Pre-KG-6 | 43 | 5.4 | Nonsectarian |
| St Isidore School | 23.5 |
Regular elementary or secondary | Pre-KG-8 | 242 | 17.2 | Roman Catholic |
| Montessori School Of East Meadow | 23.8 |
Early childhood program/child care center | Pre-KG-KG | 8 | 8.0 | Nonsectarian |
| Maplewood School | 24.0 |
Early childhood program/child care center | Pre-KG-KG | 52 | 8.7 | Nonsectarian |
| Big Chiff Nursery School & Camp | 24.5 |
Early childhood program/child care center | KG-KG | 21 | 21.0 | Nonsectarian |
| Red Robin Country Day School | 24.6 |
Early childhood program/child care center | Pre-KG-KG | 45 | 15.0 | Nonsectarian |
| South Shore Country Day School | 24.7 |
Early childhood program/child care center | Pre-KG-KG | 21 | 21.0 | Nonsectarian |
| Long Island Montessori School | 24.9 |
Montessori | Pre-KG-1 | 55 | 18.3 | Nonsectarian |
