| The Wilder School | Apo | K | 2 | 2 | Nonsectarian |
| Arlington Catholic High School/Saint Agnes School | Arlington | PreK-12 | 851 | 10.2 | Roman Catholic |
| Lesley Ellis School | Arlington | PreK-8 | 155 | 4.4 | Nonsectarian |
| New Covenant School | Arlington | PreK-5 | 65 | 8.7 | Christian (nondenominational) |
| St. Agnes School | Arlington | PreK-8 | 291 | 10.2 | Roman Catholic |
| Metrowest Christian Academy | Ashland | PreK-5 | 140 | 19.2 | Christian (nondenominational) |
| Pincushion Hill Montessori School | Ashland | PreK-K | 10 | not reported | Nonsectarian |
| Bedford Montessori School | Bedford | PreK-K | 4 | not reported | Nonsectarian |
| Nashoba Learning Group | Bedford | K-12 | 126 | 9 | Nonsectarian |
| Arlington School | Belmont | 9-12 | 25 | 2.5 | Nonsectarian |
| Belmont Day School | Belmont | 1 | 334 | 4.1 | Nonsectarian |
| CNS/Pathways Academy | Belmont | 5-12 | 29 | 4.1 | Nonsectarian |
| The Global Montessori School | Belmont | PreK-K | 1 | not reported | Nonsectarian |
| Burlington Montessori School | Burlington | PreK-1 | 14 | not reported | Nonsectarian |
| Mount Hope Christian School | Burlington | PreK-6 | 159 | 9.6 | Assembly of God |
| Primrose School of Burlington | Burlington | PreK-K | 18 | 9 | Nonsectarian |
| Tender Learning Centre | Burlington | PreK-K | 10 | 2.5 | Nonsectarian |
| Cambridge Friends School | Cambridge | PreK-8 | 122 | 6.8 | Friends |
| Cambridge High School M-Gymnasium LLD | Cambridge | 1-12 | 105 | 6.6 | Church of God |
| Fayerweather Street School | Cambridge | PreK-8 | 180 | 7.2 | Nonsectarian |
| James F Farr Academy | Cambridge | 7-12 | 24 | 2.4 | Nonsectarian |
| Malik Academy | Cambridge | PreK-3 | 38 | 5.5 | Islamic |
| Malik Academy/ Al Bustan Preschool | Cambridge | PreK-3 | 38 | 4.8 | Islamic |
| Shady Hill School | Cambridge | PreK-8 | 496 | 6.6 | Nonsectarian |
| St. Paul's Choir School | Cambridge | 3-8 | 40 | 4 | Roman Catholic, all-boys |
| St. Peter School | Cambridge | PreK-8 | 166 | 9.5 | Roman Catholic |
| Wild Rose Montessori School | Cambridge | PreK-5 | 31 | 3.3 | Nonsectarian |
| Greater Visions Childrens Center | Chelmsford | PreK-K | 9 | 9 | Nonsectarian |
| Klub Kid Too | Chelmsford | PreK-K | 6 | 6 | Nonsectarian |
| B C Campus School | Chestnut Hill | PreK-12 | 25 | 4.5 | Nonsectarian |
| Brimmer & May School | Chestnut Hill | PreK-12 | 394 | 5.6 | Nonsectarian |
| Mount Alvernia Academy | Chestnut Hill | PreK-6 | 252 | 10.4 | Roman Catholic |
| Concord Montessori School | Concord | PreK-Transitional K | 7 | not reported | Nonsectarian |
| Nashoba Brooks School | Concord | PreK-8 | 192 | 5.3 | Nonsectarian |
| The Fenn School | Concord | 4-9 | 310 | 6.6 | Nonsectarian, all-boys |
| The Tremont School | Concord | 5-12 | 36 | 4 | Nonsectarian |
| St. Anthony School | Everett | PreK-8 | 168 | 12.8 | Roman Catholic |
| Metrowest Jewish Day School | Framingham | K-8 | 40 | 2.6 | Jewish |
| St. Bridget School | Framingham | PreK-8 | 228 | 10.3 | Roman Catholic |
| Sudbury Valley School | Framingham | Ungraded | 68 | 18.9 | Nonsectarian |
| Summit Montessori School | Framingham | PreK-6 | 65 | 4.5 | Nonsectarian |
| The Brighton School | Framingham | PreK-6 | 56 | 6.7 | Nonsectarian |
| The Learning Center for the Deaf | Framingham | PreK-12 | 155 | 3.4 | Nonsectarian |
| Wayside Academy | Framingham | 6-12 | 25 | 4.2 | Nonsectarian |
| Groton Community School | Groton | PreK-K | 17 | 9.4 | Nonsectarian |
| Groton School | Groton | 8-12 | 381 | 5.6 | Episcopal |
| Lawrence Academy | Groton | 9-12 | 415 | 6.7 | Nonsectarian |
| Seven Hills at Groton | Groton | 1-12 | 35 | 8.8 | Nonsectarian |
| Darnell School for Educational & Behavioral Servic | Hudson | 3-12 | 21 | 5.2 | Nonsectarian |
| Community Therapeutic Day School | Lexington | K-6 | 32 | 2.7 | Nonsectarian |
| Cotting School | Lexington | PreK-12 | 120 | 4.7 | Nonsectarian |
| Fuse School | Lexington | PreK-K | 10 | 2 | Nonsectarian |
| Lexington Christian Academy | Lexington | 6-12 | 290 | 8.7 | Christian (nondenominational) |
| Meadowridge Pelham Academy | Lexington | 8-12 | 27 | 5.4 | Nonsectarian, all-girls |
| Waldorf School of Lexington | Lexington | PreK-8 | 154 | 6.6 | Nonsectarian |
| Birches School | Lincoln | PreK-8 | 73 | 5.8 | Nonsectarian |
| The Carroll School | Lincoln | 1-9 | 455 | 2.7 | Nonsectarian |
| Oak Meadow School | Littleton | PreK-8 | 99 | 6.2 | Nonsectarian |
| Community Christian Academy | Lowell | PreK-8 | 126 | 12.5 | Christian (nondenominational) |
| Hellenic American Academy | Lowell | PreK-6 | 78 | 11.1 | Greek Orthodox |
| Immaculate Conception School | Lowell | PreK-8 | 303 | 15.2 | Roman Catholic |
| Lowell Catholic | Lowell | PreK-12 | 705 | 11.4 | Roman Catholic |
| St. Michael School | Lowell | PreK-8 | 148 | 3.6 | Roman Catholic |
| St. Patrick School and Educational Center | Lowell | K-8 | 84 | 7.9 | Roman Catholic |
| Cheverus Catholic School | Malden | PreK-8 | 289 | 11.6 | Roman Catholic |
| Malden Catholic High School | Malden | 9-12 | 863 | 12.1 | Roman Catholic |
| New England Innovation Academy | Marlborogh | 6-12 | 107 | 6.1 | Nonsectarian |
| Crossroads School | Marlborough | K-12 | 54 | 4.5 | Nonsectarian |
| Glenhaven Academy | Marlborough | 6-12 | 34 | 6.8 | Nonsectarian |
| Hillside School | Marlborough | 4-9 | 140 | 4.8 | Nonsectarian, all-boys |
| Massachusetts Mayflower Academy | Maynard | 10-12 | 12 | 12 | Nonsectarian |
| The Imago School Association | Maynard | PreK-8 | 91 | 6.5 | Christian (nondenominational) |
| St. Joseph Elementary School | Medford | PreK-8 | 147 | 9.7 | Roman Catholic |
| Melrose Montessori School | Melrose | PreK-5 | 33 | 4.2 | Nonsectarian |
| St. Mary's School | Melrose | PreK-8 | 161 | 12.8 | Roman Catholic |
| Brandon School & Residental Treatment | Natick | 3-12 | 33 | 2.8 | Nonsectarian, all-boys |
| RCS Learning Center | Natick | 1-12 | 27 | 4.5 | Nonsectarian |
| Riverbend School | Natick | PreK-8 | 126 | 2.8 | Nonsectarian |
| St. Benedict Classical Academy | Natick | PreK-6 | 208 | 9.5 | Roman Catholic |
| Clearway School | Newton | 7-12 | 37 | 2.7 | Nonsectarian |
| Dearborn Academy | Newton | 6-12 | 50 | 3.3 | Nonsectarian |
| Fusion Academy Newton | Newton | 6-12 | 69 | 2.7 | Nonsectarian |
| Jackson School | Newton | K-6 | 159 | 13.2 | Roman Catholic |
| Newton Country Day School | Newton | 5-12 | 374 | 5.1 | Roman Catholic, all-girls |
| Solomon Schechtee Day School | Newton | PreK-8 | 359 | 4.2 | Jewish |
| Solomon Schechter Day School | Newton | PreK-8 | 359 | 5.6 | Jewish |
| Walnut Park Montessori | Newton | K | 25 | not reported | Roman Catholic |
| Wellan Montessori School | Newton | PreK-8 | 167 | not reported | Nonsectarian |
| Faulkner Kindergarten | North Billerica | PreK-K | 3 | not reported | Nonsectarian |
| Ne Pediatric School | North Billerica | Ungraded | 28 | 9.3 | Nonsectarian |
| Keystone Montessori School | North Chelmsford | PreK-6 | 22 | not reported | Nonsectarian |
| Lighthouse School | North Chelmsford | PreK-12 | 213 | 6.7 | Nonsectarian |
| Maple Dene Elementary School | Pepperell | K-5 | 12 | 10.9 | Nonsectarian |
| Pepperell Christian Academy | Pepperell | 11 | 6 | 4.6 | Christian (nondenominational) |
| Austin Preparatory School | Reading | 6-12 | 806 | 10.7 | Roman Catholic |
| Reading Montessori School | Reading | PreK-K | 5 | 2.5 | Nonsectarian |
| St. Theresa School | Somerville | PreK-8 | 126 | 12.9 | Roman Catholic |
| Greater Boston Academy | Stoneham | PreK-8 | 171 | 14.2 | Seventh-Day Adventist |
| St. Patrick Elementary School | Stoneham | PreK-8 | 208 | 6.7 | Roman Catholic |
| Corwin-Russell School at Broccoli Hall | Sudbury | 6-12 | 40 | 3.1 | Nonsectarian |
| Willow Hill School | Sudbury | 6-12 | 66 | 3.9 | Nonsectarian |
| Academy of Notre Dame | Tyngsboro | PreK-12 | 502 | 10.9 | Roman Catholic |
| Odyssey Day School | Wakefield | PreK-8 | 37 | 5.4 | Nonsectarian |
| St. Joseph School | Wakefield | PreK-8 | 192 | 15.6 | Roman Catholic |
| Chapel Hill Chauncy Hall School | Waltham | 8-12 | 198 | 5.1 | Nonsectarian |
| Gann Academy-the New Jewish High School | Waltham | 9-12 | 351 | 7.4 | Jewish |
| Milestones Day School | Waltham | 4-12 | 89 | 5.2 | Nonsectarian |
| Our Ladys Academy | Waltham | PreK-8 | 328 | 8.4 | Roman Catholic |
| Atrium School | Watertown | PreK-8 | 110 | 5.3 | Nonsectarian |
| Jewish Community Day School, Inc Dba JCDS Bostons | Watertown | K-8 | 166 | 5.8 | Jewish |
| Perkins School for the Blind | Watertown | K-12 | 174 | 2.8 | Nonsectarian |
| St. Stephen's Armenian Elementary School | Watertown | PreK-5 | 82 | 6.6 | Other religious |
| Star Academy for the Gifted and Talented | Watertown | PreK-11 | 217 | 3.6 | Nonsectarian |
| Veritas Christian Academy | Wayland | PreK-8 | 185 | 8.9 | Christian (nondenominational) |
| Learning Prep School | West Newton | 4-12 | 130 | 2.2 | Nonsectarian |
| Kindercare Learning Center - Westford | Westford | PreK-K | 10 | 10 | Nonsectarian |
| Gifford School | Weston | 4-12 | 101 | 5 | Nonsectarian |
| Meadowbrook School of Weston | Weston | PreK-8 | 295 | 4.6 | Nonsectarian |
| The Cambridge School of Weston | Weston | 9-12 | 307 | 6.8 | Nonsectarian |
| The Rivers School | Weston | 6-12 | 525 | 6 | Nonsectarian |
| Abundant Life Christian School | Wilmington | PreK-8 | 111 | 6.8 | Christian (nondenominational) |
| The Learning Experience | Wilmington | K | 9 | 9 | Nonsectarian |
| Tender Learning Centre | Wilmington | K-Transitional K | 8 | 5.7 | Nonsectarian |
| Acera School | Winchester | K-12 | 122 | 4.8 | Nonsectarian |
| Childrens Own School | Winchester | PreK-K | 17 | 3.4 | Nonsectarian |
| St. Mary's School | Winchester | PreK-K | 12 | 12 | Roman Catholic |
| St. Charles School | Woburn | PreK-8 | 151 | 9.7 | Roman Catholic |