| Fryeburg Academy ✓ | Fryeburg | 9-12 | 654 | 11 | Nonsectarian |
| Erskine Academy ✓ | South China | 9-12 | 552 | 13 | Nonsectarian |
| Waynflete School ✓ | Portland | PreK-12 | 520 | 6.3 | Nonsectarian |
| John Bapst Memorial High School ✓ | Bangor | 9-12 | 506 | 14.1 | Nonsectarian |
| St. Dominic Academy-Auburn | Auburn | PreK-12 | 446 | 12.2 | Roman Catholic |
| Foxcroft Academy ✓ | Dover Foxcroft | 8-12 | 445 | 14.4 | Nonsectarian |
| Cheverus High School ✓ | Portland | 9-12 | 344 | 11.1 | Roman Catholic |
| Bangor Christian Schools | Bangor | PreK-12 | 324 | 18.9 | Baptist |
| Washington Academy ✓ | East Machias | 9-12 | 319 | 11.8 | Nonsectarian |
| North Yarmouth Academy ✓ | Yarmouth | PreK-12 | 313 | 7.3 | Nonsectarian |
| George Stevens Academy ✓ | Blue Hill | 9-12 | 311 | 12.1 | Nonsectarian |
| Maine Central Institute ✓ | Pittsfield | 9-12 | 306 | 9.1 | Nonsectarian |
| Maine Coast Waldorf School ✓ | Freeport | PreK-12 | 227 | 6.1 | Nonsectarian |
| Temple Academy | Waterville | PreK-12 | 224 | 14 | Christian (nondenominational) |
| Gould Academy ✓ | Bethel | 8-12 | 214 | 8.2 | Nonsectarian |
| Kents Hill School ✓ | Kents Hill | 9-12 | 206 | 7.1 | Nonsectarian |
| Hebron Academy ✓ | Hebron | 6-12 | 185 | 6.8 | Nonsectarian |
| Penobscot Christian School | Bangor | PreK-12 | 182 | 9 | Christian (nondenominational) |
| Maine Coast Semester at Chewonki ✓ | Wiscasset | Transitional K-12 | 145 | 6.6 | Nonsectarian |
| Greater Portland Christian School | South Portland | PreK-12 | 136 | 7.6 | Christian (nondenominational) |
| Lee Academy ✓ | Lee | 9-12 | 128 | 12.3 | Nonsectarian |
| Pine Tree Academy | Freeport | PreK-12 | 123 | 7.7 | Seventh-Day Adventist |
| Hyde School ✓ | Bath | 9-12 | 118 | 7.4 | Nonsectarian |
| Seacoast Christian School | South Berwick | PreK-12 | 116 | 5.9 | Christian (nondenominational) |
| Calvary Christian Academy | Turner | K-12 | 108 | 12.1 | Baptist |
| Carrabassett Valley Academy ✓ | Carrabassett Valley | 7-12 | 100 | 8.3 | Nonsectarian |
| Central Maine Christian Academy | Lewiston | PreK-11 | 85 | 6.2 | Christian (nondenominational) |
| Chop Point School | Woolwich | K-12 | 84 | 6.8 | Christian (nondenominational) |
| Lisbon Falls Christian Academy | Lisbon Falls | K-11 | 63 | 6.6 | Baptist |
| Highview Christian Academy | Charleston | PreK-11 | 54 | 7.3 | Christian (nondenominational) |
| Royal Academy Education | Gray | K-12 | 54 | 12.3 | Nonsectarian |
| Androscoggin Learning & Transition Center | Auburn | K-12 | 52 | 5.2 | Nonsectarian |
| The School at Sweetser | Saco | 3-12 | 50 | 5 | Nonsectarian |
| Mmcfc, Memorial Ave | Lewiston | 5-12 | 44 | 11 | Nonsectarian |
| Opportunity Training Center | Presque Isle, | K-12 | 42 | 9.1 | Nonsectarian |
| Mse/MHC-Collaborative School | New Gloucester | 1-12 | 38 | 3.8 | Nonsectarian |
| Spurwink-Chelsea | Chelsea | 2-12 | 35 | 4.4 | Nonsectarian |
| Glickman Academy | Portland | 4-12 | 31 | 6.2 | Nonsectarian |
| Shepherds River Mennonite School | Brownfield | 1-10 | 30 | 7.9 | Mennonite |
| Blue Hill Harbor School ✓ | Blue Hill | 9-12 | 28 | 6.8 | Nonsectarian |