I–O Isle au Haut School Department Islesboro School Department Jefferson School Department Jonesboro School Department Jonesport School Department Kingsburg Plantation School Department Kittery School Department Lake View Plantation School Department Lakeville School Department Lamoine School Department Lewiston School Department Limestone School Department Lincoln Plantation School Department Lincolnville School Department Lisbon School Department Long Island School Department Lowell School Department Machias School Department Machiasport School Department Macwahoc Plantation School Department Madawaska School Department Marshfield School Department Meddybemps School Department Medford School Department Medway School Department Milford School Department Millinocket School Department Minot School Department Monhegan Plantation School Department Moro Plantation School Department Mount Desert School Department Nashville Plantation School Department New Sweden School Department Newcastle School Department Nobleboro School Department Northfield School Department Northport School Department Orient School Department Orrington School Department Otis School Department P–Z Pembroke School Department Penobscot School Department Perry School Department Pleasant Ridge Plantation School Department Portage Lake School Department Portland School Department Princeton School Department Reed Plantation School Department Robbinston School Department Rogue Bluff School Department Saco School Department Sanford School Department Scarborough School Department Sebago School Department Seboeis Plantation School Department Sedgwick School Department Shirley School Department South Bristol School Department South Portland School Department Southport School Department Southwest Harbor School Department St. George School Department Surry School Department Talmadge School Department The Forks Plantation School Department Tremont School Department Trenton School Department Upton School Department Vanceboro School Department Vassalboro School Department Veazie School Department Waite School Department Waterville School Department Wesley School Department West Bath School Department West Forks Plantation School Department Westbrook School Department Westmanland School Department Whiting School Department Whitneyville School Department Willimantic School Department Winslow School Department Winterville Plantation School Department Winthrop School Department Wiscasset School Department Woodland School Department Woodville School Department Yarmouth School Department York School Department School Administrative Districts School Administrative Districts (S.A.D.s) typically made up of 2 or more municipalities who cooperatively provide education to all of their students. , 184 cities and towns were served by 52 S.A.D.s, numbered 1 to 76 with numbers 2, 5, 9, 18, 21, 22, 25, 26, 34, 36, 38, 39, 43, 47, 48, 50, 56, 62, 66, 67, 69, 71, and 73 skipped. Regional School Units Starting in 2008, smaller school districts around the state were required to combine into Regional School Units (RSUs) or pay a hefty penalty. Community School Districts Community School Districts (C.S.D.s) in which 2 or