| Portland Public Schools | Portland | PK–12 | 6,555 |
| Lewiston Public Schools | Lewiston | PK–12 | 5,313 |
| Bangor Public Schools | Bangor | PK–12 | 3,439 |
| Rsu 06/msad 06 | Buxton | PK–12 | 3,297 |
| Sanford Public Schools | Sanford | PK–12 | 3,250 |
| Auburn Public Schools | Auburn | PK–12 | 3,242 |
| Rsu 17/msad 17 | South Paris | PK–12 | 3,075 |
| Rsu 14 | Windham | PK–12 | 3,051 |
| Rsu 57/msad 57 | Waterboro | PK–12 | 2,868 |
| Scarborough Public Schools | Scarborough | PK–12 | 2,865 |
| Gorham Public Schools | Gorham | PK–12 | 2,833 |
| South Portland Public Schools | South Portland | PK–12 | 2,816 |
| Rsu 60/msad 60 | North Berwick | K–12 | 2,801 |
| Rsu 18 | Oakland | PK–12 | 2,725 |
| Biddeford Public Schools | Biddeford | PK–12 | 2,436 |
| Brunswick Public Schools | Brunswick | PK–12 | 2,413 |
| Westbrook Public Schools | Westbrook | PK–12 | 2,348 |
| Rsu 75/msad 75 | Topsham | PK–12 | 2,302 |
| Rsu 09 | Farmington | PK–12 | 2,277 |
| Rsu 21 | Kennebunk | PK–12 | 2,262 |
| Rsu 51/msad 51 | Cumberland | PK–12 | 2,236 |
| Rsu 54/msad 54 | Skowhegan | PK–12 | 2,194 |
| Augusta Public Schools | Augusta | PK–12 | 2,120 |
| Rsu 35/msad 35 | Eliot | PK–12 | 2,120 |
| Rsu 22 | Hampden | PK–12 | 2,118 |
| Rsu 52/msad 52 | Turner | PK–12 | 2,028 |
| Rsu 05 | Freeport | PK–12 | 2,001 |
| Falmouth Public Schools | Falmouth | PK–12 | 1,979 |
| Saco Public Schools | Saco | PK–12 | 1,942 |
| Rsu 19 | Newport | PK–12 | 1,883 |
| Rsu 11/msad 11 | Gardiner | PK–12 | 1,846 |
| Rsu 15/msad 15 | Gray | PK–12 | 1,825 |
| Rsu 01 - Lkrsu | Bath | PK–12 | 1,789 |
| Rsu 40/msad 40 | Union | PK–12 | 1,762 |
| Rsu 49/msad 49 | Fairfield | PK–12 | 1,760 |
| Rsu 10 | Rumford | PK–12 | 1,739 |
| Rsu 16 | Poland | PK–12 | 1,672 |
| Rsu 79/msad 01 | Presque Isle | PK–12 | 1,670 |
| Yarmouth Schools | Yarmouth | PK–12 | 1,655 |
| Rsu 61/msad 61 | Bridgton | PK–12 | 1,627 |
| Waterville Public Schools | Waterville | PK–12 | 1,623 |
| York Public Schools | York | PK–12 | 1,539 |
| Rsu 13 | Rockland | PK–12 | 1,508 |
| Cape Elizabeth Public Schools | Cape Elizabeth | PK–12 | 1,499 |
| Brewer Public Schools | Brewer | PK–12 | 1,490 |
| Wells-Ogunquit Csd | Wells | K–12 | 1,440 |
| Rsu 02 | Hallowell | PK–12 | 1,436 |
| Rsu 71 | Belfast | PK–12 | 1,396 |
| Rsu 34 | Old Town | PK–12 | 1,369 |
| Rsu 73 | Livermore Falls | PK–12 | 1,369 |
| Hermon Public Schools | Hermon | PK–12 | 1,345 |
| Lisbon Public Schools | Lisbon | PK–12 | 1,331 |
| Rsu 04 | Wales | PK–12 | 1,269 |
| Ellsworth Public Schools | Ellsworth | PK–12 | 1,261 |
| Rsu 29/msad 29 | Houlton | PK–12 | 1,214 |
| Rsu 39 | Caribou | PK–12 | 1,188 |
| Rsu 38 | Readfield | PK–12 | 1,160 |
| Winslow Schools | Winslow | PK–12 | 1,143 |
| Rsu 12 | Somerville | PK–12 | 1,140 |
| Rsu 25 | Bucksport | PK–12 | 1,073 |
| Rsu 64/msad 64 | East Corinth | PK–12 | 1,021 |
| Rsu 03/msad 03 | Unity | PK–12 | 983 |
| Rsu 55/msad 55 | Hiram | PK–12 | 979 |
| Kittery Public Schools | Kittery | PK–12 | 966 |
| Rsu 67 | Lincoln | PK–12 | 941 |
| Rsu 26 | Orono | PK–12 | 827 |
| Msad 27 | Fort Kent | PK–12 | 812 |
| Winthrop Public Schools | Winthrop | PK–12 | 806 |
| Msad 46 | Dexter | PK–12 | 805 |
| Five Town Csd | Camden | 9–12 | 757 |
| Rsu 56 | Dixfield | PK–12 | 722 |
| Rsu 24 | Sullivan | PK–12 | 718 |
| Rsu 72/msad 72 | Fryeburg | PK–12 | 694 |
| Rsu 28/msad 28 | Camden | PK–8 | 688 |
| Rsu 44/msad 44 | Bethel | PK–12 | 664 |
| Rsu 37/msad 37 | Harrington | PK–12 | 631 |
| Rsu 23 | Old Orchard Beach | PK–12 | 614 |
| Rsu 87/msad 23 | Carmel | PK–12 | 584 |
| Rsu 41/msad 41 | Lagrange | PK–12 | 578 |
| Rsu 53/msad 53 | Pittsfield | PK–12 | 578 |
| Rsu 74/msad 74 | North Anson | PK–12 | 575 |
| Rsu 58/msad 58 | Phillips | PK–12 | 564 |
| Rsu 59/msad 59 | Madison | PK–12 | 544 |
| Calais Public Schools | Calais | PK–12 | 539 |
| Maine Connections Academy | South Portland | 7–12 | 504 |
| Vassalboro Public Schools | Vassalboro | PK–12 | 501 |
| Rsu 70/msad 70 | Hodgdon | PK–12 | 500 |
| Machias Public Schools | Machias | PK–12 | 494 |
| Boothbay-Boothbay Hbr Csd | Boothbay Harbor | PK–12 | 479 |
| Maine Virtual Academy | Augusta | 7–12 | 475 |
| Rsu 80/msad 04 | Guilford | PK–12 | 474 |
| Mt Desert Csd | Bar Harbor | 9–12 | 454 |
| Rsu 63/msad 63 | Holden | PK–12 | 443 |
| Millinocket Public Schools | Millinocket | PK–12 | 438 |
| Rsu 31/msad 31 | Lagrange | PK–12 | 435 |
| Rsu 86/msad 20 | Fort Fairfield | PK–12 | 426 |
| Richmond Public Schools | Richmond | PK–12 | 422 |
| Great Salt Bay Csd | Damariscotta | PK–8 | 397 |
| Rsu 20 | Searsport | PK–12 | 396 |
| Community Regional Charter School | Cornville | PK–12 | 385 |
| Baxter Academy for Technology and Science | Portland | 9–12 | 384 |
| Glenburn Public Schools | Glenburn | PK–12 | 381 |
| Madawaska Public Schools | Madawaska | PK–12 | 369 |
| Wiscasset Public Schools | Wiscasset | PK–12 | 364 |
| Blue Hill Public Schools | Blue Hill | PK–12 | 347 |
| Bar Harbor Public Schools | Bar Harbor | K–8 | 346 |
| Orrington Public Schools | Orrington | PK–12 | 346 |
| Deer Isle-Stonington Csd | Deer Isle | PK–12 | 343 |
| Rsu 50 | Dyer Brook | PK–12 | 340 |
| Rsu 42/msad 42 | Mars Hill | PK–12 | 333 |
| Baileyville Public Schools | Baileyville | PK–12 | 299 |
| Milford Public Schools | Milford | PK–12 | 273 |
| Rsu 45/msad 45 | Washburn | PK–12 | 271 |
| Rsu 89 | Stacyville | PK–12 | 264 |
| Rsu 88/msad 24 | Van Buren | PK–12 | 262 |
| Acton Public Schools | Acton | PK–12 | 256 |
| Acadia Academy | Lewiston | PK–6 | 250 |
| Jefferson Public Schools | Jefferson | K–12 | 246 |
| Maine Arts Academy | Augusta | 9–12 | 245 |
| Rsu 32/msad 32 | Ashland | PK–12 | 234 |
| East Millinocket Public Schools | East Millinocket | PK–12 | 230 |
| Rsu 33/msad 33 | Frenchville | PK–12 | 229 |
| Lincolnville Public Schools | Lincolnville | PK–8 | 212 |
| St George Public Schools | Tenants Harbor | PK–12 | 206 |
| Easton Public Schools | Easton | PK–12 | 203 |
| Rsu 78 | Rangeley | PK–12 | 192 |
| Bristol Public Schools | Pemaquid | PK–12 | 189 |
| Hancock Public Schools | Hancock | K–12 | 189 |
| Fiddlehead School of Arts and Sciences | Gray | PK–8 | 177 |
| Maine Academy of Natural Sciences | Hinckley | 9–12 | 177 |
| Greenville Public Schools | Greenville | PK–12 | 177 |
| Eastport Public Schools | Pembroke | PK–12 | 176 |
| East Machias Public Schools | Machias | PK–12 | 176 |
| Woodland Public Schools | Woodland | PK–12 | 175 |
| Surry Public Schools | Blue Hill | PK–12 | 168 |
| Veazie Public Schools | Veazie | PK–12 | 167 |
| Dedham Public Schools | Orrington | PK–12 | 167 |
| Mount Desert Public Schools | Bar Harbor | PK–8 | 161 |
| Rsu 30/msad 30 | Lee | PK–12 | 160 |
| Rsu 83/msad 13 | Bingham | PK–12 | 150 |
| Rsu 84/msad 14 | Danforth | PK–12 | 146 |
| Rsu 08/msad 08 | Vinalhaven | PK–12 | 143 |
| Nobleboro Public Schools | Nobleboro | K–12 | 141 |
| Hope Public Schools | Lincolnville | PK–8 | 140 |
| Limestone Public Schools | Limestone | PK–12 | 138 |
| Lamoine Public Schools | Hancock | K–12 | 137 |
| Pleasant Point | Calais | PK–12 | 137 |
| Rsu 82/msad 12 | Jackman | PK–12 | 132 |
| Appleton Public Schools | Lincolnville | PK–8 | 132 |
| Greenbush Public Schools | Greenbush | PK–12 | 131 |
| Indian Township | Calais | PK–12 | 127 |
| Southwest Harbor Public Schools | Bar Harbor | PK–8 | 127 |
| Tremont Public Schools | Bar Harbor | PK–8 | 127 |
| Ecology Learning Center | Unity | 9–12 | 120 |
| Trenton Public Schools | Bar Harbor | PK–12 | 120 |
| Sebago Public Schools | Sebago | PK–12 | 116 |
| Edgecomb Public Schools | Boothbay Harbor | PK–12 | 116 |
| Princeton Public Schools | Baileyville | PK–12 | 113 |
| Cherryfield Public Schools | Cherryfield | PK–12 | 110 |
| Medway Public Schools | Medway | K–12 | 107 |
| Athens Public Schools | Athens | PK–12 | 105 |
| Sipayik Elementary School | Perry | K–8 | 102 |
| West Bath Public Schools | West Bath | PK–12 | 101 |
| Jonesport Public Schools | Jonesport | PK–8 | 101 |
| Northport Public Schools | Northport | K–12 | 98 |
| Education in Unorganized Terr | Augusta | PK–12 | 98 |
| Eustis Public Schools | Stratton | PK–12 | 97 |
| Sedgwick Public Schools | Sedgwick | PK–12 | 97 |
| Me Sch of Science & Mathematics | Limestone | 9–12 | 96 |
| Indian Township School | Princeton | K–8 | 91 |
| Indian Island | Calais | PK–12 | 89 |
| Rsu 85/msad 19 | Pembroke | PK–12 | 87 |
| Pembroke Public Schools | Pembroke | PK–12 | 83 |
| Penobscot Public Schools | Blue Hill | PK–12 | 82 |
| Indian Island School | Indian Island | K–8 | 81 |
| Perry Public Schools | Pembroke | PK–12 | 73 |
| Fayette Public Schools | Fayette | PK–12 | 73 |
| Brooklin Public Schools | Brooklin | PK–12 | 71 |
| Otis Public Schools | Otis | PK–12 | 70 |
| Brooksville Public Schools | Blue Hill | PK–12 | 69 |
| Islesboro Public Schools | Islesboro | K–12 | 64 |
| South Bristol Public Schools | South Bristol | PK–12 | 63 |
| Moosabec Csd | Jonesport | 9–12 | 59 |
| Harmony Public Schools | Dexter | PK–12 | 57 |
| Machiasport Public Schools | Machiasport | PK–12 | 57 |
| Rsu 07/msad 07 | North Haven | K–12 | 56 |
| Castine Public Schools | Blue Hill | PK–12 | 56 |
| Jonesboro Public Schools | Machias | PK–12 | 54 |
| Georgetown Public Schools | Boothbay Harbor | PK–12 | 51 |
| Beals Public Schools | Beals | PK–8 | 48 |
| Caswell Public Schools | Caswell | PK–12 | 45 |
| Alexander Public Schools | Pembroke | PK–12 | 44 |
| Cutler Public Schools | Cutler | PK–12 | 36 |
| Airline Csd | Orrington | PK–8 | 30 |
| Msad 76 | Bar Harbor | K–12 | 29 |
| Andover Public Schools | Andover | PK–12 | 27 |
| Whiting Public Schools | Machias | PK–12 | 27 |
| Southport Public Schools | Boothbay Harbor | K–12 | 19 |
| Arthur R. Gould Sch--Lcydc | South Portland | 7–12 | 16 |
| Chebeague Island Public Schools | Chebeague Island | PK–12 | 14 |
| East Range Csd | Topsfield | PK–8 | 12 |
| Long Island Public Schools | Long Island | K–12 | 8 |
| Isle Au Haut Public Schools | Deer Isle | PK–12 | 7 |
| Cranberry Isles Public Schools | Bar Harbor | K–12 | 5 |
| Monhegan Plt School Dept | Monhegan Plantation | PK–12 | 3 |
| Frenchboro Public Schools | Bar Harbor | K–12 | 2 |
| Lake View Plt. Public Schools | Old Town | K–12 | — |
| Bridgewater Public Schools | Mars Hill | K–12 | — |
| Coplin Plt Public Schools | Coplin Plantation | K–12 | — |
| Lincoln Plt Public Schools | Lincoln Plantation | K–12 | — |
| Dayton Public Schools | Dayton | PK–12 | — |
| Crawford Public Schools | Pembroke | K–12 | — |
| Deblois Public Schools | Harrington | K–12 | — |
| Gilead Public Schools | Bethel | K–12 | — |
| Marshfield Public Schools | Machias | K–12 | — |
| Meddybemps Public Schools | Baileyville | K–12 | — |
| The Forks Plt School Dept | The Forks | K–12 | — |
| Bremen Public Schools | Damariscotta | 9–12 | — |
| Dennysville Public Schools | Pembroke | K–12 | — |
| Grand Lake Stream Plt School Dept | Baileyville | K–12 | — |
| Nashville Plt Public Schools | Ashland | K–12 | — |
| Medford Public Schools | Old Town | K–12 | — |
| Winterville Plt Public Schools | Winterville Plantation | K–12 | — |
| Rsu 68/msad 68 | Dover-Foxcroft | PK–12 | — |
| Highland Plt Public Schools | Highland Plantation | K–12 | — |
| Moro Plantation Public Schools | Patten | K–12 | — |
| Rsu 65/msad 65 | Matinicus Isle Plantation | K–12 | — |
| New Sweden Public Schools | Woodland | K–12 | — |
| Grand Isle Public Schools | Grand Isle | K–12 | — |
| Seboeis Plt Public Schools | Seboeis Plantation | K–12 | — |
| West Forks Plt Public Schools | West Forks | K–12 | — |
| Caratunk Public Schools | Anson | K–12 | — |
| Northfield Public Schools | Machias | K–12 | — |
| Lowell Public Schools | Lowell | K–12 | — |
| Carroll Plt Public Schools | Lee | K–12 | — |
| Shirley Public Schools | Shirley | K–12 | — |
| Baring Plt Public Schools | Pembroke | K–12 | — |
| Beaver Cove Public Schools | Beaver Cove | K–12 | — |
| Beddington Public Schools | Harrington | K–12 | — |
| Carrabassett Valley Public Schools | Carrabassett Valley | K–12 | — |
| Cooper Public Schools | Baileyville | K–12 | — |
| Dennistown Plt Public Schools | Searsport | K–12 | — |
| Portage Lake Public Schools | Ashland | K–12 | — |
| Kingsbury Plt Public Schools | Parkman | K–12 | — |
| Lakeville Public Schools | Lee | K–12 | — |
| Houlton-Region 2 | Houlton | — | — |
| Macwahoc Plt School Dept | Lee | K–12 | — |
| Orient Public Schools | Danforth | K–12 | — |
| Pleasant Ridge Plt School Dept | Pleasant Ridge Plantation | K–12 | — |
| Willimantic Public Schools | Willimantic | K–12 | — |
| Whitneyville Public Schools | Machias | K–12 | — |
| Reed Plt Public Schools | Lee | K–12 | — |
| Charlotte Public Schools | Pembroke | K–12 | — |
| Roque Bluffs Public Schools | Machias | K–12 | — |
| Robbinston Public Schools | Calais | K–12 | — |
| Msad 10 | Allagash | K–12 | — |
| Wesley Public Schools | Machias | K–12 | — |
| Rsu 48 | Damariscotta | — | — |
| Waldo-Region 7 | Waldo | — | — |
| Bangor-Region 4 | Bangor | — | — |
| Oxford-Region 11 | South Paris | — | — |
| Rumford-Region 9 | Mexico | — | — |
| Lincoln-Region 3 | Lincoln | — | — |
| Rockland-Region 8 | Rockland | — | — |
| Brunswick-Region 10 | Brunswick | — | — |
| Upton Public Schools | Bethel | K–12 | — |
| Vanceboro Public Schools | Vanceboro | K–12 | — |
| Westmanland Public Schools | Woodland | K–12 | — |
| Talmadge Public Schools | Baileyville | K–12 | — |
| Waite Public Schools | Baileyville | K–12 | — |
| Glenwood Plt Public Schools | Linneus | K–12 | — |
| Woodville Public Schools | Woodville | K–12 | — |
| Newcastle Public Schools | Damariscotta | 9–12 | — |
| Damariscotta Public Schools | Damariscotta | 9–12 | — |
| Bowerbank Public Schools | Old Town | K–12 | — |
| Brighton Plt School Department | Anson | K–12 | — |
| Burlington Public Schools | Burlington | K–12 | — |
| Byron Public Schools | Byron | K–12 | — |
| Eagle Lake Public Schools | Eagle Lake | K–12 | — |